Roman Architecture 1

Part 1: Overview of Roman Architecture
Focus on historical context, architectural innovations, and the transition from Greek to Roman ideals.

April 21, 753 B.C.: Established by the Romans as the founding date of Rome by Romulus.
Early Romans were noted for being militant and disciplined but lacked artistic culture initially.
They absorbed elements from Greek culture, embracing literature, philosophy, science, and painting, leading to a newfound appreciation of the arts.

ETRUSCAN CIVILIZATION: Preceded Roman Empire in Italy. Highly advanced in hydraulic engineering and funerary architecture.
Heavily influenced Roman architecture, specifically in the development of the true arch and the temple plan.

Construction Materials:
- Primarily wood, clay, rubble, and terracotta for ornamentation.
- Stone was typically used for temple bases (podiums), fortifications, and tombs.
Notable Structures:
- City walls and rock-cut tombs at Cerv teri, Chiusi, Corneto Tarquinia, and Perugia.
Etruscan Tomb Examples:
- $480$ BC: Tomb of the Lioness, Tarquinia
- $200$ s BC: Tomb of the Reliefs, Cerveteri
- c. $100$ s BC: Porta Augusta, Perugia (an early example of the use of the voussoir arch).

Roman architecture is characterized by practicality, scale, and propagandistic elements used to celebrate the Empire.
Architectural Innovations:
- Development of the arch, barrel vault, and groin vault, allowing for large interior spans without internal supports.
- Five Orders of Architecture: Adoption of the three Greek orders (Doric, Ionic, Corinthian) and the introduction of two new orders:
- Tuscan Order: A simplified, un-fluted version of the Doric order with a base.
- Composite Order: A highly decorative combination of the Ionic volutes and Corinthian acanthus leaves.
- Concrete (Opus Caementicium): A mixture of lime, sand, pozzolana, and various aggregates (caementa) such as broken bricks or small stones.
- Pozzolana: Volcanic ash pivotal for constructing durable concrete that could set underwater.

Shift from Greek outdoor worship spaces to interior-focused spaces through modifications like engaged columns (columns attached to walls).
Maison Carr e at N mes: A pseudoperipteral temple featuring a deep porch and high podium, showcasing Romanized Greek forms.

Public Works: Implementation of the grid system in military camps (castra) and colonial towns.
Basilica of Constantine: Also known as the Basilica Nova; utilized massive concrete vaults to create vast unobstructed spaces for law courts and assemblies.

Sophisticated social centers featuring a sequence of temperatures:
- Caldarium (hot bath), tepidarium (warm bath), frigidarium (cold bath), and natatio (open-air swimming pool).
- Additional rooms: apodyteria (changing rooms), palaestrae (gymnasiums), and laconica (dry saunas).
Bath of Caracalla: Spanning $25$ hectares; functional for over $300$ years; utilized a hypocaust system (central heating system using furnaces to circulate hot air under floors and through walls).

Masterpieces of gravity-fed engineering transporting water over vast distances.
Pont du Gard Aqueduct, N mes: A three-tiered bridge built of precisely cut masonry without mortar, maintaining a constant gradient of approximately $1$ in $3,000$ .

Colosseum (Flavian Amphitheatre):
- Capacity for $50,000$ to $80,000$ spectators.
- Utilized a complex system of radial and annular vaults.
- Facade features superimposed orders: Tuscan (bottom), Ionic (middle), and Corinthian (top).
Circus Maximus: Primary venue for chariot races; capable of seating $300,000$ spectators in a long U-shaped arena.

Pantheon:
- Features a perfect hemispherical dome with a diameter of $43.3$ meters ( $142$ feet).
- Oculus: A $9$ -meter wide circular opening at the peak to provide light and ventilation.
- Coffers: Recessed panels in the dome to reduce weight without compromising structural integrity.

Insulae: Five-to-seven story apartment blocks for commoners; often prone to fire and collapse.
Domus: Private townhouse for the elite.
- Atrium: Central open hall.
- Tablinum: Study or office.
- Triclinium: Formal dining room (with three couches).
- Peristyle: Inner colonnaded garden.
Villas: Suburban or country retreats (e.g., Villa of Hadrian at Tivoli), reflecting personal architectural tastes of Emperors.

Grid Planning: Cities designed around two main axes:
- Cardo: North-South main street.
- Decumanus: East-West main street.
Timgad: Built for veterans of Trajan’s army; a prime example of the rigid grid plan.

The legacy of Roman architecture lies in the mastery of "architecture of space" rather than the "architecture of form" favored by the Greeks. Their engineering feats in concrete and vaulting remain the foundation for modern structural design.