plate no. 8183

Saint Cosmas and Saint Damian before Lisius

panel, temperaEarly Renaissancereligious paintingfiguresarchitecturereligious scenecolumnsrobesthrone

what to study here

It shows how a strict three-zone value plan, line-defined drapery and invisibly blended flesh in tempera keep a crowded figure scene readable.

Study how the value structure carries the picture. The foreground ground is near-black, the background walls are pale cream, and the figures sit between those two poles. Lisius's burgundy robe and the blues and pinks read as mid-to-mid-dark values against both. Flesh stays close in value to the cream wall, so faces and highlights stay legible against the dark floor. Then look at how the folds are drawn. Thin dark lines follow the contour of the cloth over fairly consistent base colors, instead of graduated shading. Flesh is blended almost invisibly, with no visible strokes, through patient layering of tempera. The halos are thin gold rings with sharp outer edges, not glows. Architecture (columns, gilt entablature, ornament) is rendered with mechanical precision and frames the scene like a stage. Light falls frontally and evenly across all figures. For a student, this is a lesson in clarity: separate the big value zones first, then control edges and line. Note the palette is read from the image, and the pigment mixes are the vision model's suggestions, not documented.

key decision

The painter set a near-black foreground against a pale cream background, placing the figures between them so faces and robes separate clearly. Folds are defined by thin dark lines rather than tonal modeling.

recreation guide

This recreation focuses on Fra Angelico’s *Saint Cosmas and Saint Damian before Lisius* (c. 1440), a work that exemplifies the artist’s transition from late Gothic conventions to Early Renaissance naturalism. The painting is characterized by the 'sweetness and gentleness' of its figures, whose bearing and expression are noted by Vasari as coming 'nearer to the truth' than those of other artists (Source 1). While the work likely employs the lavish gilded robes and brilliance of color associated with Angelico’s Vatican chapel commissions, it also demonstrates the solidity and three-dimensional form emerging in his later altarpieces, where drapery follows the structure of the bodies beneath (Source 4). The medium is tempera on panel, requiring a meticulous approach to layering and color mixing that avoids the hue shifts common in oil painting.

estimated time

40-60 hours over 8-12 sessions

materials

7 items

steps

6 in sequence

materials

item	purpose	modern equivalent
Gesso ground on wood panel	Traditional support for tempera painting, providing a smooth, absorbent surface.	Pre-primed gesso panel or MDF board with rabbit-skin glue gesso
Egg tempera paints	Primary medium for the artwork, allowing for fine detail and luminous color layers.	Commercial egg tempera or homemade egg yolk emulsion with dry pigments
Azurite pigment	Historically used by Angelico for blue tones, particularly in garments and backgrounds.	Natural azurite powder or high-quality phthalo blue mixed with white for tempera consistency
Vermilion pigment	Used for reds in robes and flesh tones, noted in Angelico’s altarpieces.	Cinnabar substitute or cadmium red light (with caution for toxicity)
Gold leaf	For haloes and decorative edges on garments, reflecting Gothic conventions retained by Angelico.	23k gold leaf or high-quality imitation gold leaf
Charcoal	For initial underdrawing and shading, allowing for easy correction before paint application.	Vine charcoal or compressed charcoal
Raw umber	For setting the palette and establishing mid-tones in the underpainting stage.	Raw umber oil or tempera paint

preparation

surface prep

Prepare a wood panel with multiple layers of gesso to create a smooth, white ground. This is essential for tempera painting, which relies on the reflective quality of the white ground to achieve luminosity. Angelico’s works, particularly his altarpieces, often feature finely worked gold grounds or bright, clear surfaces that require a pristine base (Source 4). Ensure the surface is sealed with rabbit-skin glue to prevent the tempera from soaking in too deeply.

underdrawing

Begin with a charcoal underdrawing. As advised in traditional practice, draw and shade in charcoal to model forms before applying paint. This allows for corrections without damaging the final paint layers, as charcoal offers little resistance to a brush and can be erased with bread if needed (Source 8). Focus on the 'solidity, three-dimensional form, and naturalism' of the figures, ensuring the drapery follows the structure of the bodies beneath (Source 4).

underpainting

Apply a thin wash of raw umber to establish the basic tonal values. This step helps in defining the light and shadow masses before introducing color. While specific underpainting techniques for this exact work are not detailed in the sources, the general practice of establishing broad masses before finish is recommended for correcting weaknesses in handling large areas (Source 5).

color palette

Luminous Blue

Azurite mixed with white lead or egg white

Garments and backgrounds, consistent with Angelico’s use of azurite in prestigious altarpieces (Source 4).

Vibrant Red

Vermilion

Robes and accents, reflecting the 'brilliance of colour' found in his Vatican chapel works (Source 1, Source 4).

Gold

Gold leaf applied over size

Haloes and garment edges, adhering to Gothic decorative conventions (Source 4).

Neutral Gray

Black and white, or complementary colors mixed to neutralize

Shadows and background elements, to avoid hue shifts when darkening colors (Source 3).

composition

The composition likely features a 'careful arrangement of a few significant figures,' a trait Angelico demonstrated in his San Marco frescoes (Source 1). The figures should convey a sense of physical weight and humility, with expressions that are sweet and gentle (Source 1). The use of linear perspective, which Angelico demonstrated in his Annunciation paintings, may be evident in the architectural elements or spatial arrangement, though specific details of this painting’s layout are not described in the sources (Source 4).

step by step

underdrawing→underpainting→first pass→refining→finishing→varnishing

underdrawing

step 01
Sketch the figures in charcoal, focusing on the correct proportions and the gentle, truthful expressions characteristic of Angelico’s saints.
Tip — Make corrections in the charcoal stage to avoid fatal errors in paint (Source 8).
Charcoal underdrawing

underpainting

step 02
Apply a thin wash of raw umber to establish the basic light and shadow masses.
Tip — Use this stage to check the overall composition and tonal balance.
Imprimatura

first pass

step 03
Begin applying tempera colors in thin, glazing layers. Start with the lighter tones and work towards the darker shadows.
Tip — Avoid adding black to darken colors, as this can cause hue shifts towards green or blue (Source 3).
Tempera glazing

refining

step 04
Refine the details of the drapery, ensuring it follows the structure of the bodies beneath to convey physical weight.
Tip — Use complementary colors to neutralize and darken hues without shifting the hue (Source 3).
Drapery modeling

finishing

step 05
Apply gold leaf to the haloes and decorative edges of the garments, adhering to the Gothic conventions present in Angelico’s work.
Tip — Ensure the size is tacky before applying the leaf to prevent lifting.
Gold leaf application

varnishing

step 06
Apply a final varnish to protect the tempera layers and enhance the luminosity of the colors.
Tip — Allow the painting to dry completely before varnishing.
Varnishing

critical techniques

Color Mixing with Complements

To darken colors without shifting their hue, mix with their complementary color rather than black. For example, use purplish-red to darken yellowish-green (Source 3).

Gentle Expression

Render the faces with sweetness and gentleness, aiming for a truthful bearing that reflects Angelico’s piety and humility (Source 1).

Solidity of Form

Ensure the figures have three-dimensional form and physical weight, with drapery that follows the body’s structure (Source 4).

common pitfalls

→Adding black to darken colors, which can cause undesirable hue shifts (Source 3).
→Over-modeling or being too tied down to the outline, which can result in a stiff appearance (Source 5).
→Ignoring the structural integrity of the drapery, leading to a lack of physical weight in the figures (Source 4).
→Applying paint with obvious errors in construction, which is difficult to correct in tempera (Source 8).

what the sources don't tell us

Where the corpus is silent, we say so rather than guess. These are the gaps a complete recreation guide would normally cover that our source passages don't.

·Specific iconographic details of *Saint Cosmas and Saint Damian before Lisius* are not described in the sources, such as the exact gestures of the saints or the appearance of Lisius.
·The specific layout of the architectural background in this particular painting is not detailed.
·The exact ratio of egg yolk to pigment used by Fra Angelico is not specified.

grounded in

The technical procedure in this guide traces to the following classical art-instruction texts.

The Practice of Oil Painting — ON COPYING↗
- ON COPYING — applied to Advice on correcting weaknesses and avoiding over-modeling.
The Practice of Oil Painting — PAINTING FROM LIFE↗
- PAINTING FROM LIFE — applied to Use of charcoal for underdrawing and correction.

cross-referenced from

Named facts about this artwork and artist were checked against these reference pages.

Wikipedia bio — Fra Angelico — part 7↗
- Artistic legacy — applied to Overview of Angelico’s style, sweetness of figures, and use of gold/color.
Wikipedia: Color theory — Color theory — part 6↗
- Color theory — applied to Technique for darkening colors using complements instead of black.
Wikipedia bio — Fra Angelico — part 6↗
- Altarpieces — applied to Use of azurite, vermilion, gold, and the solidity of form in drapery.

Read more about the corpus on the sources page and how the guides are built on the methods page.

read from the painting

observed from the image, not the label

6 dominant colors, measured

what the eye sees

Two haloed saints present themselves to Lisius, who dominates the scene from an elevated throne at the composition's center. Light falls frontal and consistent across all figures, giving the flesh a luminous, porcelain-like quality. The eye enters at the halos and faces of the left-hand saints, travels to Lisius's commanding position, then settles on the attendants and soldiers arrayed to the right. A deep black foreground ground and pale cream-colored background architecture create strong spatial recession, while the decorative columns and gilt entablature frame the entire scene like a stage.

value structure

Extremely high separation between light and dark: the foreground ground is near-black, the background walls read as pale cream, and figures stand between these poles. Lisius's burgundy robe and the surrounding blues and pinks read as mid-to-mid-dark values that pop against both the bright wall and dark floor. Shadows within folds and under the throne drop to match the ground plane's darkness, while flesh faces and highlights stay near the value of the cream background—this contrast is key to the figures' legibility.

observed palette and mixes

#d9c3a8
Lead white with trace ochre; or gesso with thin ochre glaze
Background wall panels and light architectural surfaces
#bca383
Lead white + yellow ochre + small amount of raw umber
Gilt architectural details, throne frame, decorative moldings
#a1866b
Yellow ochre + raw umber + alizarin red, mid-tone
Shadows within gold architectural elements and throne structure
#875a49
Alizarin red + raw umber + small cadmium yellow
Deep folds in burgundy robes, red drapery, architectural shadows
#4b4c55
Ultramarine blue + raw umber + touch of white
Cool shadows, particularly in folds of blue robes and under architectural overhang
#292427
Bone black or charcoal black with trace ultramarine
Foreground ground plane, hair shadows, deepest fold shadows, outlines

edges and brushwork

Edges are remarkably crisp and linear—drapery folds are defined by thin dark lines that follow the contour of cloth rather than modeled with graduated tone. Flesh tones blend almost invisibly, with no visible brushstrokes; the effect is achieved through extraordinarily patient layering and smoothing of tempera. Gold halos are rendered as thin, precise rings with sharp outer edges, not atmospheric glows. The architectural ornament is rendered with mechanical precision—no wobble or softness.

a working sequence

01
Transfer composition and establish proportions
Lightly draw the entire scene on gessoed panel: the central throne at true center, the two haloed saints at left occupying roughly one-third the width, attendants and soldiers distributed at right. Check that Lisius's head aligns roughly with the line of the entablature above, and that the columns divide the background into clear bays. The foreground figures should be scaled relative to the architectural frame—the columns should feel monumental, not toy-like.
02
Block the value structure with thin washes
Establish three zones: paint the entire background wall with pale cream (near #d9c3a8), flood the foreground ground plane with near-black (nearly pure black, very saturated), and leave the throne and figures as bare gesso for now. This establishes the reading distance and makes all subsequent value judgments relative to these anchors.
03
Render architectural framework and throne
Paint the columns with warm tan (#bca383) for the main body, reserving dark cool shadows (#4b4c55 to #292427) for the channels and undercuts. Add the gilt entablature with its dentil molding—use steady brushwork and a straightedge. The throne seat should be painted in warm gold-tan with deep burgundy-brown shadow beneath it. Pay particular attention to the pink background panels—they should read as mauve-pink, distinctly cooler and grayer than the robe colors.
04
Establish flesh tones and base robe colors
Block the faces of all figures with a warm peachy-tan (white + alizarin + yellow ochre). Paint the saint robes at left in ultramarine blue, the attendants and middle figures in warm pinks and whites, Lisius in deep burgundy, and soldiers at right in reds, yellows, and blues. Use broad strokes; precision comes later. Notice how the pink robes at left read lighter than Lisius's burgundy—the value hierarchy is already implicit.
05
Model flesh faces and render halos
Soften the peachy base of each face with gentle value gradations—shadows in eye sockets and under cheekbones stay warm but slightly darker. Render the halo rings at left as precise thin gold outlines (white + yellow ochre + touch of umber), keeping the line crisp and the inner area left pale. The halos are the visual anchors for the saints; they must be luminous but never thick or fuzzy.
06
Define drapery with folds and shadow lines
Refine each robe by painting subtle value shifts in the mid-tones and then adding thin dark linear accents that follow the fold edges. In the blue robes, use a mix of ultramarine + raw umber for shadow lines; in the pinks and reds, use alizarin + umber. The lines should be thin and controlled—they define the silhouette of the cloth, not shade it. This is where tempera's ability to layer precisely becomes essential.
07
Refine architectural details and gold
Strengthen the depth of the columns' channels and the shadows under the entablature. Add crisp white highlights to catch-lights on the gilt elements. The decorative circular ornament (pearls or guttae) should be rendered as small circles of light tan with tiny dark shadows beneath. Keep these details understated—the architecture is a stage, not the focus.
08
Final refinement and optical unity
Step back and check that the black foreground reads as a unified deep dark without becoming muddy. Ensure flesh tones glow against both the dark ground and the pale background. Sharpen any edges that have softened, particularly where figures meet the background. A final subtle warm glaze over the entire scene (if using tempera) can unify the color temperature and give the painting its warm, aged luminosity.

where studies of this painting go wrong

The foreground ground is saturation-black—not brownish or shadowy. Overworking or adding muddy colors here will kill the spatial read. Keep it pure and clean.
Drapery folds are defined by LINE, not tone. Beginners tend to shade folds with value gradation; here, thin dark lines over consistent base colors create the illusion of volume. Restraint is essential.
Flesh tones demand invisible blending. Tempera does not reward fast work; soft edges require patience, multiple thin layers, and a damp brush. Overworking leads to muddy, dead skin.
Halos must remain thin and gold—not thick, not yellow, not glowing or atmospheric. They are jewelry on the heads of saints, rendered with precision equal to the architectural moldings.
The background wall panels are mauve-pink, not saturated pink. They should feel cool and recessive, not bright or forward. A touch of gray or ultramarine is essential to keep them quiet.
Architectural proportions are complex. Columns must feel structurally sound, entablature elements must align, and the perspective of the throne must be convincing. Rushing the drawing stage will expose itself in every layer.

measured difficulty