plate no. 9935

Portrait of Fra Antionio Martelli

oil, canvasBaroqueportraitportraitfiguremanclothingcrossdark background

what to study here

It shows how a portrait can be built from two value groups and a few small lights, with soft edges on the flesh and crisper ones on the cross.

Study how little of this canvas is lit. The vision analysis finds light entering from the upper left and landing on three small areas: the forehead and cheekbone, the white collar triangle, and the Maltese cross. Everything else, including the background, the black doublet and the shadowed right side of the face, falls into one continuous dark mass. There is almost no mid-tone; values jump from deep shadow to highlight, so the face reads as sculpted. Squint and you should see two groups, dark and light. The cross sits at the vertical center and pulls the eye along with the head. Notice the edges. Where light meets shadow on the cheekbone and the lit-to-shadow transition of the face, they are soft, and the brushwork is nearly invisible, with smoothly fused flesh. The collar and cross have slightly crisper edges because they are discrete objects catching full light. The sitter's gaze tilts slightly downward, which gives the pose an inward quality. Copy the value structure first, in a small monochrome study, before thinking about color.

key decision

The painter collapsed the value range into near-black darks and a few concentrated lights, with almost no mid-tone. The lights are on the forehead and cheekbone, the collar and the cross.

recreation guide

Portrait of Fra Antonio Martelli (1608) is a late work by Caravaggio, created during his final years in exile. The artwork is distinctive for its adherence to the artist’s signature tenebrism, a heightened form of chiaroscuro that brings high drama and emotional intensity to the subject (Source 3). Unlike earlier idealized portraits, this work reflects Caravaggio’s insistence on painting from life without preliminary drawings, capturing an acutely observed realism that was often polarizing among his peers (Source 3). The painting likely employs the old master technique of glazing and scumbling over a monochrome underpainting, a method widely practiced by artists of this period to achieve depth and luminosity, though modern painters often hold prejudice against it (Source 1).

estimated time

40-60 hours over 8-12 sessions

materials

6 items

steps

5 in sequence

materials

item	purpose	modern equivalent
Oil paint (various pigments)	Primary medium for painting	High-quality artist-grade oil paints
Linseed or Poppy oil	Binder and medium for thinning paint and glazing	Refined linseed oil or poppy seed oil
Turpentine	Thinner for initial layers and cleaning	Odorless mineral spirits or pure gum turpentine
Canvas	Support surface	Linen canvas, primed
Varnish (e.g., Copal or Dammar)	Final protective layer and to enhance depth of glazes	Art resin varnish
Black, Ultramarine, White	For the initial monochrome underpainting (grisaille)	Ivory black, Ultramarine blue, Titanium or Lead white

preparation

surface prep

Prepare a linen canvas with a traditional oil ground. Caravaggio’s works from this period were typically executed on canvas. The surface should be smooth to allow for the fine detail required in the facial features and the sharp transitions of light and shadow characteristic of his tenebrism. While specific ground recipes for this exact portrait are not detailed in the sources, the general practice of the time involved oil grounds to facilitate the glazing techniques described in Source 1.

underdrawing

Caravaggio is documented as insisting on painting from life without drawings (Source 3). Therefore, no detailed underdrawing should be used. The artist should likely sketch lightly with charcoal or thinned paint directly on the ground to establish proportions, but the primary structure should emerge through the painting process itself, avoiding the rigid lines of a preparatory sketch.

underpainting

Execute a grisaille (monochrome underpainting) using black, ultramarine, and white, mixed with oil of copavia or a similar medium (Source 1). This layer establishes the values and forms. The artist must mentally extract red and yellow colors, translating what would remain in nature if those colors were absent (Source 1). This step is crucial for the subsequent glazing process.

color palette

Black

Ivory black or Lamp black

Underpainting and deep shadows in the tenebrist style

Ultramarine

Natural ultramarine

Underpainting and cool shadows

White

Lead white (historically) or Titanium white

Underpainting and highlights

Red/Yellow tones

Vermilion, Red Ochre, Yellow Ochre

Glazing and scumbling over the grisaille to introduce flesh tones and warmth

composition

The composition likely features a stark contrast between light and dark, consistent with Caravaggio’s tenebrism (Source 3). The subject is presented with acutely observed realism, avoiding idealization. The lighting is dramatic, focusing attention on the face and hands, while the background recedes into darkness. Specific compositional details such as the exact pose or background elements are not described in the sources, so the artist should rely on the general principle of dramatic lighting and realistic observation.

step by step

underpainting→refining→finishing→varnishing

underpainting

step 01
Create a grisaille underpainting using black, ultramarine, and white. Mix with oil of copavia or a similar medium. Establish the full range of values from deep shadows to bright highlights.
Tip — Mentally extract red and yellow colors, focusing on the structural forms and light/shadow relationships as if those colors were not present.
Grisaille

refining

step 02
Once the grisaille is quite dry, begin glazing and scumbling. Apply transparent coats of color (glazing) and semi-opaque layers (scumbling) to introduce the red and yellow tones.
Tip — Use oil at first for glazing. As mastery increases, mix varnish and oil. Treat the process like tinting an engraving with watercolors.
Glazing and Scumbling
step 03
Pay close attention to the simultaneous contrast of colors. Be aware that adjacent colors will affect the perception of each other, potentially altering the apparent hue and tone.
Tip — The eye may be fatigued by disentangling subtle modifications. Ensure that the colors are harmonized according to the nature of the objects, not just their isolated appearance.
Simultaneous Contrast

finishing

step 04
Refine the details of the face and hands, ensuring the realism is acute and the emotional intensity is conveyed through the lighting.
Tip — Avoid idealization. Capture the specific likeness and texture of the skin and clothing as observed from life.
Direct Painting from Life

varnishing

step 05
Apply a final varnish to protect the painting and enhance the depth of the glazes.
Tip — Ensure the painting is completely dry before varnishing to avoid trapping solvents.
Varnishing

critical techniques

Tenebrism

A heightened chiaroscuro that creates high drama and emotional intensity. This is central to Caravaggio’s style and is evident in the stark contrast between light and dark areas.

Glazing and Scumbling

Used to color the monochrome underpainting. Glazing involves transparent coats of color, while scumbling involves semi-opaque layers. This technique allows for rich, luminous colors and subtle transitions.

Simultaneous Contrast

Understanding how adjacent colors affect each other’s appearance. This is crucial for achieving accurate color harmony and avoiding visual fatigue or inaccuracies in color perception.

common pitfalls

→Failing to let the grisaille dry completely before glazing, which can lead to muddiness and loss of transparency.
→Ignoring the effects of simultaneous contrast, resulting in colors that appear inaccurate or disharmonious.
→Overworking the paint, losing the freshness and immediacy of the direct observation from life.
→Using too much medium in the glazes, leading to a weak, unstable paint film.

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 pigments used by Caravaggio for this particular portrait are not detailed in the sources.
·The exact dimensions and aspect ratio of the canvas are not provided.
·Detailed description of the subject’s clothing, jewelry, or background elements is absent from the sources.
·The specific lighting setup used by Caravaggio for this portrait is not described.

grounded in

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

The Practice of Oil Painting↗
- COLOURING A MONOCHROME — applied to Underpainting and glazing techniques
Laws of Contrast of Colour↗
- 315-318 — applied to Color theory and simultaneous contrast

cross-referenced from

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

Wikipedia bio — Caravaggio↗
- part 5 — applied to Biographical context, tenebrism, and painting from life
Wikipedia: Oil painting↗
- part 1 — applied to General oil painting materials and varnishing

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

Light enters from the upper left, raking across the sitter's face and the white Maltese cross on his chest, leaving the rest of the composition in deep shadow. The figure's head and the cross are the brightest elements and draw the eye immediately; everything else—the black doublet, the dark background, the shadowed right side of the face—recedes. The cross sits precisely at the vertical center, anchoring the composition, while the sitter's profile-turned gaze and slight downward tilt create introspection rather than engagement.

value structure

The darkest darks dominate: nearly black background and black clothing form a continuous shadow zone. The lightest lights are concentrated in three small areas—the forehead and cheekbone catching raking light, the white collar triangle, and especially the Maltese cross itself. There is almost no mid-tone gray; instead, values jump from deep shadow directly to highlights, creating sculptural drama. Squint and you see two value groups: dark (background and clothing) and light (face and cross).

observed palette and mixes

#1a180e
Ivory black + raw umber (cool black for shadows)
Background, deepest folds of the doublet, shadowed cheek and jaw
#785c36
Burnt umber + raw umber + touch of ivory black
Mid-tone flesh on lit forehead and cheekbone, warm undertones on the nose and ear
#231f12
Ivory black + burnt umber
Black doublet, creating depth and volume through very subtle warm shadows
#e8dcc8
Titanium white + raw umber + touch of linseed oil (pale ochre-white)
Illuminated areas of face, collar, and Maltese cross—the brightest passages

edges and brushwork

Edges are soft where light and shadow meet (the boundary along the cheekbone, the transition from lit to shadowed side of the face), achieved by blending or glazing. The white collar and cross have slightly crisper edges because they are a discrete object catching full light. Brushwork is nearly invisible; the paint is smoothly fused, especially in the flesh, with no visible strokes—this is classical chiaroscuro technique, not gestural handling.

a working sequence

01
Establish the dark ground
Lay down a thin, even wash of ivory black + raw umber (cool dark) across the entire canvas. This serves as your base and will show through many later layers, unifying the painting. Let it dry completely; this is your foundation.
02
Block in the head and shoulders
Using a mid-brown (burnt umber + raw umber), establish the general mass of the head and the outline of the black doublet. Keep values still fairly dark and unified; you're defining form, not rendering light yet. Indicate the collar as a simple triangular shape.
03
Model the face with warm shadow-to-light
Begin building the face with layered glazes of burnt umber + raw umber, warming slightly on the lit side (forehead, cheekbone, nose). Keep the shadowed right half of the face quite dark. The transition should be gradual—blend carefully where raking light meets shadow along the cheekbone and temple. This is where chiaroscuro lives.
04
Establish the Maltese cross
Paint the cross in a pale, cool off-white (titanium white + touch of raw umber). Keep the edges crisp but not harsh. The cross should read as a distinct object against the black doublet. Notice the four arms taper slightly toward their points—do not make them blunt.
05
Refine facial anatomy and light direction
Strengthen the lit passages on the forehead, cheekbone, and the bridge of the nose with a warmer pale tone (titanium white + burnt umber + raw umber, warmer than the cross). Keep the shadowed side of the face receding into near-black. Pay attention to how light catches the orbital bone above the eye and curves around the cheekbone—these subtle planes define the head's form.
06
Render the collar and neckline
The white collar is actually two triangular planes meeting at the center front. Paint each plane slightly differently—one may be warmer, one cooler—to show how they fold. The upper edge of the collar should be soft and dissolved into shadow; the lower edge (meeting the black doublet) can be slightly firmer. Leave some of the warm flesh tone visible where the neck meets the collar.
07
Deepen and unify the dark areas
Work back into the black doublet and background with very thin, warm glazes of burnt umber or raw umber to lift them slightly from absolute black and to create subtle form in the drapery. The doublet should have almost invisible folds visible only as minor warmth shifts—do not overstate them. The background remains nearly flat and very dark.
08
Final details and edges
Soften edges where face meets shadow by gentle blending or very thin glazing. The right ear should be barely visible, rendered in shadow. Add small details: the whites of the eyes (very subtle, in shadow on the far side), the nostril (a soft warm shadow), the mouth line (barely indicated). Step back frequently to check that light and shadow remain in correct proportion.
09
Evaluate and balance
The final step is comparison: the illuminated areas (forehead, cross) should feel like they glow from a single light source above and to the left. The shadowed half of the face should recede convincingly. If the face feels too gray or muddy, transparent highlights may need to be brighter and cooler. If edges feel too sharp, gentle glazing will soften them.

where studies of this painting go wrong

Making the face too symmetrical or failing to commit to the sharp shadow boundary on the left side of the nose and cheek—the light source is very directional, not diffuse.
Rendering the Maltese cross as flat white instead of as a folded fabric object with subtle shading and directionality in each arm.
Overworking or blending the transition from light to shadow until it becomes murky gray instead of a clear chiaroscuro shift from warm illumination to cool deep shadow.
Painting the black doublet as uniformly black instead of allowing subtle warm undertones (burnt umber glazes) to suggest folds and volume without breaking the darkness.
Making the collar too bright or too white—it should be pale but warm, reading as linen catching sidelight, not as pure reflected light.

measured difficulty