plate no. 7060

Nuns in the Certosa Cloister, overlooking a Moonlit Sea towards the Faraglioni, Capri

oil, canvasRomanticisminteriornunscloistermoonlit seaarchesarchitecturelandscape

what to study here

It shows how a night scene can be organised as three clear value zones, with edge softness controlling the move from interior to moonlit sea.

Study how the value structure carries the whole picture. The vision analysis describes three zones: a warm, mid-dark cloister interior on the left, a transition at the archway opening, and a cool, bright moonlit sea on the right. The interior stone sits around values 4–5 on a 10-point scale, while the moon and its reflection are near white. Squint and the composition reads as those three shapes, which is what pulls the eye through the arches to the opening. Look at edges as well. Inside the cloister, edges are fairly sharp where stone meets shadow, which defines the arch geometry. At the opening they soften and diffuse, so the moonlight seems to bleed into the landscape. Brushwork stays subordinate to form and is nearly invisible, except for slightly looser strokes on the moonlit water. The three nuns are small and low in light against the architecture, so scale is part of the picture's effect. Copy the value map first, then check the warm-to-cool transition at the threshold.

key decision

Catel reserves the brightest values, the moon and its water reflection, for the sea opening and keeps the cloister in warm mid-dark values. Edges soften only at the threshold, which draws the eye through the arches.

From the record

Dimensions: 73 cm high × 98 cm wide
Institution: Spencer Museum of Art
Location: Spencer Museum of Art
Inception: 1823
Materials: oil paint, canvas

moonlight
monastery
monk

Wikidata item Q137969715

recreation guide

This artwork, created by Franz Ludwig Catel in 1823, exemplifies his transition into the 'new classic school of landscape' while retaining a strong interest in architectural detail and figure placement (Source 5). Catel is noted for laboring to make his perspective tell effectively and for gaining a great mastery over light and shade, particularly in works that combine interior or cloistered settings with expansive exterior views (Source 5). The painting likely utilizes the Romantic era's emphasis on atmospheric effects, where the contrast between the dark interior of the Certosa cloister and the moonlit sea creates a dramatic chiaroscuro effect. While specific visual details of the nuns or the exact layout are not described in the provided sources, the work aligns with Catel’s documented practice of painting landscapes with prominent architectural details and figures in the foreground, often moving into genre painting territory (Source 5).

estimated time

40-60 hours over 8-12 sessions

materials

6 items

steps

5 in sequence

materials

item	purpose	modern equivalent
Canvas	Primary support for oil painting	Linen or cotton canvas, primed
Oil paints (pigments)	Color application	Titanium White, Lead White (historical), Ultramarine, Ochres, Umbers
Linseed oil or Poppy seed oil	Binder for pigments; provides flexibility and rich color	Refined linseed oil or walnut oil
Turpentine	Thinner for initial layers and cleaning	Odorless mineral spirits or pure gum turpentine
Palette knife	Mixing colors and applying thick impasto if needed	Standard palette knife
Brushes	Application of paint	Hog bristle for impasto, sable for glazing

preparation

surface prep

The canvas should be prepared with a ground suitable for oil painting, likely a white or off-white gesso to allow for the full range of light and dark values Catel mastered (Source 7). Historical practice involved sizing the canvas with animal glue and applying multiple layers of chalk and glue or oil-based gesso to create a smooth, absorbent surface. Catel’s focus on 'light and shade' suggests a bright ground would be beneficial for building up luminous highlights in the moonlit scene (Source 5).

underdrawing

Catel’s precise architectural details and effective perspective suggest a careful underdrawing, likely executed in charcoal or thinned oil (bitumen or umber) to map out the linear construction of the cloister arches and the distant Faraglioni rocks (Source 1). Given his background in wood carving and book illustration, he likely valued precise linear construction before applying color (Source 5).

underpainting

A grisaille or monochrome underpainting is likely to establish the 'massing of light and shade' that Catel was known for (Source 1). This step would define the contrast between the dark interior of the cloister and the bright moonlit sea, ensuring the 'chiaro-scuro' effect is structurally sound before adding color (Source 2).

color palette

Moonlight Blue/Grey

Ultramarine, White, touch of Yellow Ochre

The moonlit sea and sky; Catel’s mastery of light suggests cool tones for the moonlight

Deep Umber/Black

Burnt Umber, Ivory Black

The shadows of the cloister interior and the nuns’ habits

Warm Ochre/White

Yellow Ochre, White

Highlights on the architecture and moonlit water reflections

Neutral Grey

White, Black, touch of Red or Blue

Mid-tones of the stone architecture

composition

Catel characteristically places prominent architectural details in the foreground or middle ground, using them to frame the landscape view (Source 5). The composition likely uses the cloister arches to create a 'frame within a frame' effect, directing the viewer’s eye from the dark interior to the bright exterior. His inclination to make perspective 'tell effectively' suggests a strong vanishing point leading towards the sea and Faraglioni (Source 5). The figures (nuns) are likely placed in the foreground to provide scale and a genre element, consistent with his move into genre painting (Source 5).

step by step

underdrawing→underpainting→first pass→refining→finishing

underdrawing

step 01
Sketch the architectural lines of the cloister and the distant Faraglioni rocks with charcoal or thinned paint. Focus on accurate perspective.
Tip — Ensure the vanishing point aligns with the viewer’s eye level to enhance depth.
Linear construction

underpainting

step 02
Apply a monochrome layer (grisaille) to establish the light and shadow masses. Darken the interior cloister and lighten the moonlit sea.
Tip — Use the contrast between light and dark to create a 'true gradation of light' (Source 2).
Chiaro-scuro

first pass

step 03
Block in the main colors. Apply cool blues and greys to the sea and sky, and warm umbers to the stone architecture.
Tip — Remember that juxtaposing colors affects their appearance; blue beside red verges on orange, so adjust hues accordingly (Source 3).
Color blocking

refining

step 04
Refine the details of the nuns’ habits and the architectural textures. Use glazing to deepen shadows and enhance the luminosity of the moonlight.
Tip — Use the law of simultaneous contrast to intensify colors; surround the moonlight with darker tones to make it appear brighter (Source 4).
Glazing

finishing

step 05
Add final highlights to the water and moon. Ensure the transition between the dark interior and bright exterior is smooth but distinct.
Tip — Check the overall harmony of colors, ensuring that the inherent colors of the objects (stone, water, fabric) are balanced (Source 2).
Highlighting

critical techniques

Chiaro-scuro

Used to create dramatic contrast between the dark cloister interior and the moonlit exterior, enhancing the illusion of depth and atmosphere.

Simultaneous Contrast

Applied to intensify the moonlight by surrounding it with darker tones, and to harmonize the colors of the architecture and sea.

Perspective Mastery

Catel’s focus on making perspective 'tell effectively' is crucial for rendering the cloister arches and distant landscape accurately.

common pitfalls

→Failing to establish a strong underpainting for light and shade, resulting in a flat appearance.
→Ignoring the law of simultaneous contrast, leading to muddy or dull colors when juxtaposing the moonlight with the dark interior.
→Overworking the details of the nuns or architecture before the underlying values are correct, which can obscure the perspective.

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 pigment recipes used by Catel in 1823 are not detailed in the sources.
·The exact facial expressions or gestures of the nuns are not described, so they must be inferred from general genre painting conventions.
·The specific texture of the canvas or ground used by Catel is not explicitly stated, though standard oil painting practices are assumed.

grounded in

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

The Practice of Oil Painting — THE FRENCH SCHOOL↗
- General Technique — applied to Underdrawing and linear construction
Laws of Contrast of Colour↗
- Chiaro-scuro and Contrast — applied to Underpainting and color harmony
The Science of Painting↗
- Color Theory — applied to Color juxtaposition and intensification

cross-referenced from

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

Wikipedia bio — Franz Ludwig Catel↗
- Biography and Style — applied to Artist’s focus on perspective, light/shade, and architectural details

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

A moonlit nocturne set in a monastic cloister: the foreground is dominated by warm-toned Romanesque arches and vaulted stone architecture on the left, while the right side opens into a radiant seascape. The full moon hangs bright in the upper-center of the sea view, its reflection casting a luminous path down the water toward the silhouetted Faraglioni rock formations. Three nuns occupy the scene—one standing alone on the left in cream drapery, two more on a platform to the right; all are rendered in low light, drawing attention to their small scale against the monumental architecture. The eye is pulled through the cloister toward the bright opening and moon.

value structure

The painting hinges on extreme value contrast: the interior stonework sits in warm mid-dark values (roughly 4–5 on a 10-point scale), while the nocturnal seascape beyond is predominantly cool mid-tones punctuated by the bright moon and its reflection (near white). The deepest darks are reserved for architectural shadow recession and the silhouetted Faraglioni. Squint and the composition resolves into three zones: warm-dark interior (left-center), an intermediate transition at the archway opening, and cool-bright moonlit landscape (right). This value structure is what pulls the eye through the space.

observed palette and mixes

#64532e
Raw umber + yellow ochre, warmed with touch of burnt sienna
Lit surfaces of the arches and interior walls—the dominant warm tone
#573c19
Raw umber + burnt sienna, slightly darker
Mid-tone shadows within the cloister arches
#372d13
Raw umber + ivory black
Deep shadows in arch recesses and early silhouette of the left nun
#292511
Ivory black + touch of raw umber, very dark
Darkest shadows and the silhouetted Faraglioni rocks against the sky
#999e7b
Ultramarine blue + yellow ochre + white (grey-green)
Sea surface and moonlit sky in the landscape opening
#f5f3e8
Titanium white + touch of yellow ochre
Moon itself and its reflection path on the water

edges and brushwork

Edges within the cloister are relatively sharp where stone meets shadow, defining the geometric structure of the arches. At the opening to the seascape, edges soften and diffuse as moonlight bleeds into the landscape, creating atmospheric recession. Brushwork is subordinate to form throughout—smooth, assured, and nearly invisible except in the luminous handling of moonlight on water, where slightly looser strokes suggest movement and shimmer without becoming obvious.

a working sequence

01
Establish the value map
Sketch the composition lightly, then block in broad value zones with thin washes: warm mid-dark for the interior cloister mass, cool mid-tone for the seascape, and reserved white paper (or primer) for the moon and its water reflection. Use this underpaint to lock in the tonal architecture before adding detail.
02
Build the architectural framework
Paint the arches and vaulted interior with raw umber and yellow ochre, following the receding perspective of the colonnade. Establish the warm vs. cool temperature shift at the threshold where the interior meets the opening. Don't blend too early—work in distinct layers so the structure reads clearly.
03
Model the interior stonework
Add shadows to the arch surfaces using raw umber + ivory black, being careful to preserve the geometry of the vaults. The left archway recedes deeper than the center; darken it progressively to suggest recession. Leave the stone faces lit enough to show surface texture and form.
04
Paint the nocturnal seascape
Mix a cool grey-green from ultramarine blue, yellow ochre, and white. Block in the sea and sky, keeping the moonlit area notably brighter—the moon itself should be nearly pure white with only the faintest touch of warm tint. Let the moon 'float' in the sky by keeping that zone luminous but not overworked.
05
Render moonlight reflection
Paint the bright reflection path from moon to water with pale cream (white + touch of ochre), keeping it sharp enough to read as light bouncing off water. The reflection should narrow as it recedes, following atmospheric perspective. Soften the edges where it meets the darker sea.
06
Mass in the Faraglioni silhouettes
Using ivory black + ultramarine, paint the distinctive rock formations as dark silhouettes against the brighter moonlit sky. Keep their outline edges sharp to preserve their recognizable shape, but allow the tone to sit slightly forward of the darkest arch shadows.
07
Position and define the nuns
Lightly place the three figures: one on the left balcony in cream drapery (lit warmly by the interior), two on the right platform overlooking the sea (silhouetted against the moonlit opening). Keep them small and understated so they don't compete with the architecture and light. The white veils and robes should glow against the interior shadow.
08
Refine atmospheric transitions
Soften the threshold where warm interior meets cool seascape, creating a convincing atmospheric transition without a harsh line. Check that the contrast between foreground warmth and distant cool light reads as moonlight, not just arbitrary color choice. Add final highlights where moonlight catches the top of the forward arch.

where studies of this painting go wrong

The warmth-to-coolness transition at the opening is easy to bungle—if too abrupt, it feels disjointed; if too blended, it loses the drama of the nocturnal light source. Work this boundary carefully, allowing a gradual shift.
The moon must be bright enough to feel luminous as a light source, but rendering it as pure bright white without form risks making it look flat and pasted-on. A tiny touch of pale ochre and the faintest modeling will keep it three-dimensional and convincing.
The interior arches can easily slide into muddy browns if you overblend the warm underpainting. Let the raw umber, ochre, and sienna do their work distinctly in the structure before unifying tonally.
The Faraglioni rocks are silhouettes but not featureless—their jagged profile is essential to their identity. Don't lose their distinctive outline in overly soft handling; keep edges crisp while allowing them to recede in tone.

measured difficulty