# Italian Rationalism (イタリア合理主義)

> An Italian movement that set out to make the abstraction of modern architecture and the classicism of the Mediterranean hold at the same time. What looks like a white box is in fact carrying ancient proportion in the rhythm of its bays, the depth of its overhangs and the planes of its marble. A textbook for refusing to set the modern against the traditional.

- IndexStyle No.500 — https://indexstyle.org/styles/italian-rationalism
- Kind: Style · Family: Modern Architecture · Era: 1926–1943
- Mood: Trust, Luxury, Technology
- Color cues: #e9e6dd / #67635d / #171615 (cues taken from reference works, not a fixed palette)

## Defining characteristics

- White volumes and a regular rhythm of bays
- Deep overhangs and bands of shadow
- Marble set against glass
- Classical proportion, translated

## Best used for

- Architectural and interior identity that must feel contemporary and rooted at once, for hotels, cultural buildings and heritage brands
- Grid design, where the rhythm of bays translates directly into a column structure that stays classical while reading as modern

## Research method

This entry records a historical style; derive the treatment from its sources rather than a fixed recipe:

- A geometric sans set to the same module as the bays, with the leading derived from the same proportion.
- A strict frontal grid whose bays are equal and whose voids are not, so that the rhythm is regular and the reading is not.
- White render against polished marble and plate glass, with reveals deep enough to cast a real shadow line.

## What to avoid

Keeping the white box and dropping the proportion: without the underlying ratios it is generic modernism, and the whole argument of these buildings was that the ratios were still present.

## Application checklist

Before calling a piece an application of this style, check it against the defining characteristics:

- [ ] White volumes and a regular rhythm of bays
- [ ] Deep overhangs and bands of shadow
- [ ] Marble set against glass
- [ ] Classical proportion, translated
- [ ] At least one reference work below has been studied directly
- [ ] The caution above ("What to avoid") has been addressed

## Related styles

- **International Style (インターナショナル・スタイル)** — Strips ornament and aims at a universal architectural language crossing borders: the box, the free plan, steel, concrete and glass. → https://indexstyle.org/styles/international-style
- **Novecento Italiano (ノヴェチェント・イタリアーノ)** — A movement that, after the avant-garde had dismantled form, sought a return to the mass and stillness of Italian classicism. Simplified, solid bodies, subdued earth colour and emphatically frontal composition became the vocabulary of interwar public building and mural painting. A leading case of the return to order, and one that has to be read together with its closeness to the regime. → https://indexstyle.org/styles/novecento-italiano

## Further study

- Terragni's Casa del Fascio
- The programme of Gruppo 7
- The history of its assessment as architecture of the regime

## Reference works

- Giuseppe Terragni《カサ・デル・ファッショ》コモ 1936 — Wikimedia Commons / CC BY-SA 4.0 — https://commons.wikimedia.org/wiki/File:Casa%20del%20Fascio%20(Como)%2002.jpg
- カサ・デル・ファッショ（コモ）— Wikimedia Commons / CC BY-SA 4.0 — https://commons.wikimedia.org/wiki/File:Como%20Casa%20del%20Fascio%20Terragni.jpg
- カサ・デル・ファッショの白黒写真 — Wikimedia Commons / CC BY-SA 4.0 — https://commons.wikimedia.org/wiki/File:Casa%20del%20Fascio%20bianco%20e%20nero%20Terragni.jpg

## Source of record

- Wikipedia — Italian Rationalism — https://en.wikipedia.org/wiki/Italian_Rationalism

## Machine surfaces

- JSON: https://indexstyle.org/api/styles/italian-rationalism
- Image-generation prompt (legally clean): https://indexstyle.org/styles/italian-rationalism/prompt.txt
- MCP: https://indexstyle.org/mcp (tools: search_styles, get_style, compose_styles; prompts: image-prompt, apply-style)

## 日本語

近代建築の抽象と地中海の古典を同時に成立させようとしたイタリアの運動。白い箱に見えて、実際は柱間の律動、深い庇、大理石の面が古代の比例を引き受けている。近代と伝統を対立させない解き方の教科書。

特徴: 白い量塊と規則的な柱間／深い庇と陰影の帯／大理石とガラスの対比／古典比例の翻案
注意: 表面的な記号へ還元せず、時代・地域・技術・制作主体の文脈を確認する。