Mesa Verde, Spruce Tree House

At the heart of the Anasazi culture was the kiva, a round, covered hole in the center of the communal plaza in which all ceremonial life took place.

Pont du Gard

An aqueduct used to carry water from the distant hills to the Roman compound. It's an example of the arch, a curved, semicircular architectural form that spans an opening or space built of wedge-shaped blocks, called voussoirs, with a keystone centered at its top.

Interior of the Pantheon

A temple created by the Roman's to celebrate all their gods.

It's in the shape of a dome, simply defined as a continuous arch rotated 360 degrees on it's axis. 

Interior of the Amiens Cathedral

The Gothic cathedral's interior space is achieved by means of a system of pointed arches, which rise more steeply to a point at its top as opposed to rounded arches.

Frank Lloyd Wright, Robie House

The contemporary home is an example of the cantilever, a horizontal form supported on one end and jutting out into space on the other, made possible by newly invented steel-and-reinforced-concrete construction techniques.

Le Corbusier, Perspective drawing for Domino Housing Project

The simplicity of the structure identified Le Corbusier as one of the founders of a new "International Style". 

Miës can der Rohe and Philip Johnson, Seagram Building

The Internation Style is marked by it's strict geometric simplicity, and the design solution presented by the Seagram Building is extremely elegant.

Olmsted, general plan of Riverside, Illinois

Olmsted strived to create a communal spirit by subdividing the site into small "village" areas linked by drives and walks, all near common areas that were intended to have "the character of informal village greens, commons, and playgrounds."

An example of green architecture, a practice that strives to build more environmentally friendly and sustainable building.

ZIGGURATS

Flat and wide Mesopotamian structures, that imitate the shape of the foothills that lead up to the mountains.