plate no. 9025

Inside the Colosseum

oil, canvasRomanticismlandscapearchitectureruinsfiguresvegetationcolosseumlandscape

what to study here

It shows how three value masses and warm earth colors can describe a large ruined interior, with soft stone edges and small figures for scale.

Start with the value structure. Squint and the vision analysis reads three masses: dark arch shadows, warm lit stone, and pale sky. The darkest browns pool under the major arches and in the interior vaults, and they carry the tonal foundation. The lit left-facing column planes sit against those darks, and the sky is nearly the same value as the brightest stone, so the pale zone reads as luminous. Light comes from the upper left, and the repeated arches of the receding arcade run the eye back into the structure. Look at how the edges are handled. Shadows grade into mid-tones with soft blending, while column bases and arch curves are crisper but defined by value and color shifts rather than drawn lines. Vegetation is loose and broken, clustered at the top and in shadow, so it does not compete with the masonry. The small figures at center ground give scale. The palette is mostly warm earths, from pale grey-white through ochre-browns to near-black brown. Study how much range comes from a narrow hue family.

key decision

Catel held the picture to three value masses (dark arch shadows, warm lit stone, pale sky) and kept the sky close in value to the brightest stone so the light reads as luminous against the dark vaults.

From the record

Dimensions: 100.4 cm high × 137.5 cm wide
Institution: Art Institute of Chicago
Location: Art Institute of Chicago
Inception: 1823
Materials: oil paint, canvas

Wikidata item Q20264668

recreation guide

Franz Ludwig Catel’s 'Inside the Colosseum' (1823) is a quintessential example of early 19th-century Romantic landscape painting, characterized by the integration of prominent architectural details within a naturalistic setting. Catel, who spent most of his career in Rome, was known for laboring to make his perspective tell effectively and to gain great mastery over light and shade (Source 1). His work often moved into the territory of genre painting by including figures in the foreground, though the primary focus remains the topographical view of the architecture (Source 1, Source 2). The painting likely exhibits the 'new classic school of landscape' style, emphasizing breadth and atmospheric depth, influenced by his travels to Sicily and his association with the Nazarene circle in Rome (Source 1).

estimated time

30-40 hours over 6-8 sessions

materials

5 items

steps

6 in sequence

materials

item	purpose	modern equivalent
Oil paints (Ultramarine, White, Black, Earth tones, Vermilion/Red Ochre)	Primary pigments for the grisaille underpainting and subsequent glazing layers.	High-quality tube oils; Ultramarine and White are specifically cited in Reynolds' method which aligns with the period's practice (Source 4).
Linseed oil or Poppy seed oil	Binder for the paints and medium for glazing.	Refined linseed oil or cold-pressed poppy oil.
Turpentine	Thinner for initial layers and cleaning.	Odorless mineral spirits or pure gum turpentine.
Canvas	Support for the oil painting.	Linen or cotton canvas, primed with gesso.
Varnish (optional for final protection)	To protect the painting and enhance depth, as oils were sometimes boiled with resin to create varnish (Source 5).	Dammar or synthetic resin varnish.

preparation

surface prep

The canvas should be primed with a white or light-toned gesso ground to allow for the effective use of light and shade, which Catel mastered (Source 1). While specific ground colors for this exact painting are not detailed, the period practice often involved a neutral or warm ground to facilitate the glazing techniques described in contemporary manuals (Source 4).

underdrawing

Catel’s inclination toward effective perspective suggests a precise underdrawing, likely executed in charcoal or thinned oil to map the architectural lines of the Colosseum. The sources do not specify his exact underdrawing medium, but the emphasis on 'making perspective tell effectively' implies a rigorous structural foundation (Source 1).

underpainting

A grisaille (monochrome) underpainting is recommended, consistent with the period's 'old master' techniques which involved establishing form and value before adding color. Sir Joshua Reynolds, a contemporary authority, described a method using black, ultramarine, and white for the first and second paintings (Source 4). This aligns with Catel’s focus on light and shade (Source 1).

color palette

Ultramarine

Pure ultramarine pigment

Shadows and sky tones in the grisaille stage, as per Reynolds' cited method (Source 4).

White

Lead white or zinc white

Highlights and mixing with ultramarine/black for the grisaille (Source 4).

Black

Ivory black or lamp black

Deep shadows and structural definition in the underpainting (Source 4).

Yellow/Red tones

Yellow ochre, vermilion, or red lake

Glazing and scumbling over the dry grisaille to introduce warmth and local color, particularly for the stone architecture and atmospheric light (Source 4).

Green

Verdigris or mixed green earth

Vegetation within the Colosseum, utilizing complementary contrast with red/orange tones if present (Source 3).

composition

The composition likely features prominent architectural details of the Colosseum, arranged to create a coherent topographical view (Source 2). Catel’s style often included figures in the foreground to provide scale and narrative, moving into genre painting territory (Source 1). The perspective is designed to be effective, drawing the viewer’s eye into the depth of the structure (Source 1).

step by step

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

underdrawing

step 01
Sketch the architectural structure of the Colosseum with precise perspective lines. Include foreground figures if desired, consistent with Catel’s genre tendencies.
Tip — Ensure the architectural lines are accurate, as Catel labored to make perspective tell effectively (Source 1).
Perspective drawing

underpainting

step 02
Apply a grisaille underpainting using black, ultramarine, and white to establish the full range of light and shade. Focus on the structural forms of the ruins and the atmospheric depth.
Tip — Mentally extract red and yellow colors, translating what would be left in nature if these colors were not present (Source 4).
Grisaille

first pass

step 03
Allow the grisaille to dry completely. Begin glazing with transparent oil colors, starting with yellow and red tones to warm the highlights and mid-tones.
Tip — Glazing is a transparent coat of color that allows the underlying painting to show through, enhancing depth (Source 4).
Glazing

refining

step 04
Use scumbling (semi-opaque painting) to adjust tones, particularly in areas where a 'grey bloom' or coldness is desired, such as in shadowed architectural recesses.
Tip — Scumbling over a darker ground tends to coldness, which can be useful for atmospheric effects (Source 4).
Scumbling

finishing

step 05
Refine the contrast between light and shade, ensuring the complementary colors (e.g., blue/orange or red/green) create visual tension and harmony where appropriate.
Tip — Use complementary colors to create strong contrast and visual interest, as per traditional color theory (Source 3).
Color harmony

varnishing

step 06
Apply a final varnish to protect the painting and unify the surface sheen, if desired.
Tip — Oils may be boiled with resin to create varnish for protection and texture (Source 5).
Varnishing

critical techniques

Glazing and Scumbling

Used to build up color and light effects over a dry monochrome underpainting. This method was practiced by old masters and allows for rich, luminous colors (Source 4).

Perspective Mastery

Catel labored to make his perspective tell effectively, which is crucial for depicting the complex architecture of the Colosseum (Source 1).

Light and Shade

Gaining mastery over light and shade was a key goal for Catel, essential for creating the atmospheric depth characteristic of his landscapes (Source 1).

common pitfalls

→Applying color too opaquely in the early stages, which can muddy the luminosity achieved through glazing (Source 4).
→Neglecting the precise perspective of the architecture, which is central to Catel’s style (Source 1).
→Overworking the paint, losing the vitality of the medium. Oil paint should be used to express feeling, not just to deceive the eye with illusion (Source 7).
→Ignoring the effects of simultaneous contrast, where adjacent colors influence each other’s appearance (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.

·The specific pigments used by Catel for this 1823 painting are not detailed in the sources.
·The exact dimensions and canvas preparation method for this specific work are not provided.
·The specific figures or narrative elements in the foreground of 'Inside the Colosseum' are not described in the sources, so their inclusion is inferred from his general style.
·The specific lighting conditions (time of day, weather) depicted in this particular painting are not described, though Catel was known for mastering light and shade.

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 Grisaille underpainting and glazing/scumbling techniques (Source 4).
Laws of Contrast of Colour↗
- Simultaneous Contrast — applied to Understanding how adjacent colors affect perception (Source 8).

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 landscapes (Source 1).
Wikipedia: Complementary colors↗
- Traditional color model — applied to Use of complementary colors for contrast and harmony (Source 3).
Wikipedia: Oil painting↗
- Materials and Techniques — applied to Use of oil binders and varnishes (Source 5).

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 floods from the upper left, illuminating the massive stone columns and archways with a warm, golden glow while casting deep shadows beneath the arches. The composition draws the eye through the foreground figures toward the receding arcade, where repeated arches create strong perspective lines that lead deeper into the structure. Vegetation drapes selectively across the stone surfaces, clustering densely at top and within shadow areas, while the pale sky visible through openings provides atmospheric relief. The figures at center ground—rendered small but detailed—establish scale and movement, anchoring the viewer in the vast architectural space.

value structure

The darkest values pool in the deep shadow vaults beneath the major arches and in the interior recesses; these very dark browns give the painting its tonal foundation. The bulk of the stone lives in a warm mid-tone range, with clear separation between shadow-facing surfaces and the brilliantly lit left-facing planes of the columns. The sky and brightest stone highlights are nearly equivalent in value, creating a luminous pale zone that contrasts powerfully with the darker arches. When squinted, the painting shows three dominant value masses: dark arch shadows, warm lit stone, and pale sky.

observed palette and mixes

#d3cdcd
titanium white + touch of raw umber
illuminated column faces, the brightest stone surfaces catching direct light, sky
#a98961
yellow ochre + burnt sienna + white
the warm mid-tone of lit stone surfaces, reflected light in shadows, foreground ground plane
#774c28
burnt sienna + raw umber + touch of cadmium red light
the dominant warm stone color, shadow sides of columns, mid-tones throughout the masonry
#553f21
raw umber + burnt sienna + ultramarine blue
deeper shadow tones on stone, recessed areas, underside of arches
#4a2c13
raw umber + ultramarine blue + burnt sienna (heavy)
deep shadows cast beneath major arches, interior vaults, darkest recesses
#292210
ultramarine blue + burnt sienna + raw umber (nearly opaque dark)
the absolute darkest shadow areas, creating strong silhouettes within the arches

edges and brushwork

The stone surfaces are rendered with soft, blended brushwork—shadows transition gradually into mid-tones rather than with hard boundaries, creating the weathered, rounded quality of ancient masonry. Vegetation is handled more loosely and impressionistically, with broken brushstrokes suggesting foliage texture without literal detail, creating visual interest through varied mark-making. Architectural edges (the sharp lines of column bases, arch curves) are crisper but never harsh; they're defined by value shift and color difference rather than drawn lines.

a working sequence

01
Establish the structural foundation
Lightly draw the major arches and columns using a thin wash of burnt sienna and ultramarine blue. Establish the vertical rhythm of the arcade and the recession lines that pull the eye back through the openings. Don't overwork this—aim for clear architectural scaffolding that will guide everything else.
02
Map the light and value masses
Block in the three major value zones with broad strokes: the pale sky/distant light through a very light mix (white + touch of yellow ochre), the warm mid-tone stone with a large wash of yellow ochre + burnt sienna + white, and the deep shadow areas under the arches with raw umber + ultramarine blue. Keep these shapes loose and overlapping; you're establishing value relationships, not detail.
03
Render the lit stone surfaces
Reinforce the left-facing planes of columns and major stone surfaces with white + yellow ochre + touch of red. Follow the direction of light from upper left, making sure the illuminated faces read clearly against both the shadowed masonry and the background. These warm lights are the compositional backbone.
04
Deepen shadow areas and model the columns
Layer deeper shadow tones (raw umber + ultramarine blue + burnt sienna) into the recessed areas, under the main arches, and within the column vaults. Work softly—let the shadows emerge through subtle value shifts rather than dark outlines. The shadow sides of the columns should be noticeably darker than the lit sides but still read as stone, not black.
05
Add vegetation strategically
Paint the climbing ivy and overgrowth with a dry, broken brushwork using sap green mixed with raw umber for darker greens and sap green + yellow ochre for lighter accents. Focus vegetation most densely at the top edges and upper corners, allowing it to suggest age and decay without obscuring the architectural structure. Keep foliage loose—it should suggest texture rather than depict individual leaves.
06
Place the figures and refine foreground
Paint the small figures in the middle ground using warm burnt sienna for their clothing and subtle modeling for their forms. They should read clearly but remain secondary to the architecture. Add details to the foreground ground plane—small stones, shadow variations, and the warm earth tones that anchor the viewer's position.
07
Adjust transitions and atmospheric perspective
Soften the value transitions between lit and shadow areas throughout, working from dark into light so the brushwork remains organic. As the arches recede into the background, slightly cool and lighten the tones to suggest atmospheric distance. Refine the sky tones, ensuring they're warm (not pure white) and hazy.
08
Final refinement and edge control
Step back and assess the overall value structure—the darkest darks should feel punchy and the lit surfaces luminous. Sharpen select architectural edges (corners of columns, arch curves) while keeping others soft. A final glaze of thinned medium over select shadow areas can unify and deepen them. Resist adding too much detail; suggest rather than state.

where studies of this painting go wrong

The stone color easily becomes flat and monochromatic. This painting lives in the shadows and half-tones—resist painting the main masonry too light or uniform. The blocks need subtle directional lighting and weathering to read as three-dimensional and ancient.
The transition from lit to shadowed stone appears gradual in the actual painting but is surprisingly easy to make too abrupt. Blend these edges carefully with intermediate mid-tones rather than jumping directly from highlight to deep shadow.
Vegetation can overpower the architecture if painted too densely or brightly. Keep it selective, especially around the key structural elements, and use darker greens so foliage recedes rather than advances.
The figures are small but critical for establishing scale and movement. Paint them carefully with convincing posture and clothing; if they look stiff or oversized, the entire sense of monumentality collapses.
The sky and background feel washed-out in reproduction but actually contain warm, subtle color (yellow ochre, touch of red) rather than pure white. If the sky reads as too bright or cool, the illuminated stone will fail to glow.

measured difficulty