An instrument by which to find a horizontal line, or adjust something with reference to such a line.

Level

An instrument by which to find a horizontal line, or adjust something with reference to such a line.

"A tower or other elevated structure bearing a light at the top and erected at the entrance of a harbor or on some rock or headland to serve as a guide or warning of danger to navigators at night." -Foster, 1921

Lighthouse

"A tower or other elevated structure bearing a light at the top and erected at the entrance of a harbor…

The Lucerne Railway Station in Switzerland.

Lucerne Railway Station

The Lucerne Railway Station in Switzerland.

A shop in Lucerne, Switzerland selling antiques.

Antiques Shop in Lucerne, Switzerland

A shop in Lucerne, Switzerland selling antiques.

An art and antiques shop in Lucerne, Switzerland.

Art and Antiques Shop in Lucerne, Switzerland

An art and antiques shop in Lucerne, Switzerland.

A store near the cathedral in Lucerne, Switzerland selling silks.

Silk Store in Lucerne, Switzerland

A store near the cathedral in Lucerne, Switzerland selling silks.

A shop in Lucerne, Switzerland selling Longines watches.

Watch Store in Lucerne, Switzerland

A shop in Lucerne, Switzerland selling Longines watches.

Changing the ground level to a smooth horizontal or gently sloping surface.

Grading Machine

Changing the ground level to a smooth horizontal or gently sloping surface.

An illustration of a line of men entering and exiting a building.

Men Entering & Exiting Building

An illustration of a line of men entering and exiting a building.

A mill which grounds grain into flour. This flour mill is located on a body of water.

Floating Flour Mill

A mill which grounds grain into flour. This flour mill is located on a body of water.

A monument is a type of structure either explicitly created to commemorate a person or important event or which has become important to a social group as part of their remembrance of past events.

Explicit Monument

A monument is a type of structure either explicitly created to commemorate a person or important event…

"The Nativity. By Albrecht Dürer. From the engraving on copper." -Heath, 1901

The Nativity

"The Nativity. By Albrecht Dürer. From the engraving on copper." -Heath, 1901

With the Newburgh Addresses was privately circulated a notification of a meeting of officers at a large building called "the Temple."

"The Temple," Newburg

With the Newburgh Addresses was privately circulated a notification of a meeting of officers at a large…

An old meeting house in Hampden, Maine.

Old Meeting House, Hampden

An old meeting house in Hampden, Maine.

The Old State House in Hartford, Connecticut where the Hartford Convention met in 1814.

Old State House

The Old State House in Hartford, Connecticut where the Hartford Convention met in 1814.

In several Egyptian temples there are square or rectangular piers fronted with colossal sculptured figures of Osirid holding a scourge and a "Nile key" or "key of life."

Osirid Pier

In several Egyptian temples there are square or rectangular piers fronted with colossal sculptured figures…

"Temple in Palmyra." — Goodrich, 1844

Temple in Palmyra

"Temple in Palmyra." — Goodrich, 1844

This pavilion is a free standing structure located near a main building or residence. Since this pavilion was built to take advantage of the view it may also be called a Gazebo.

Folding Pavilion Structure

This pavilion is a free standing structure located near a main building or residence. Since this pavilion…

Men in the Civil War building a pontoon bridge across a river.

Pontoon Bridge

Men in the Civil War building a pontoon bridge across a river.

Egyptians using pulleys to build a pyramid.

Building the Pyramids

Egyptians using pulleys to build a pyramid.

Carpenters' Hall is a four-story brick building in Center City Philadelphia, Pennsylvania which played a significant part in the early history of the United States.

Room in which Congress met in Carpenters' Hall

Carpenters' Hall is a four-story brick building in Center City Philadelphia, Pennsylvania which played…

An illustration of Brooklyn Navy-Yard's round house.

Round House

An illustration of Brooklyn Navy-Yard's round house.

School building in Lake Alfred, with children playing in front.

School

School building in Lake Alfred, with children playing in front.

An illustration of a a one room log schoolhouse.

Schoolhouse

An illustration of a a one room log schoolhouse.

"An open-air schoolroom in Sacramento, California. The inclosed room is used only in bad weather." — Ritchie, 1918

Open-air schoolroom

"An open-air schoolroom in Sacramento, California. The inclosed room is used only in bad weather." —…

An early 20th century skyscraper.

Early Skyscraper

An early 20th century skyscraper.

An incomplete skyscraper, with steel framework visible.

Incomplete skyscraper

An incomplete skyscraper, with steel framework visible.

The South Carolina Institute in Charleston in 1860.

The South Carolina Institute

The South Carolina Institute in Charleston in 1860.

St. John's Church in Hampton, Virginia.

St. John's Church

St. John's Church in Hampton, Virginia.

The Massachusetts State House, also called Massachusetts Statehouse or the New State House, is the state capitol and seat of government of the Commonwealth of Massachusetts. It is located in Boston.

The State House, Boston, Massachusetts

The Massachusetts State House, also called Massachusetts Statehouse or the New State House, is the state…

The Sumaree Temple in Benares, India is an example of Sanskrit architecture.

Sumaree Temple

The Sumaree Temple in Benares, India is an example of Sanskrit architecture.

Outlines of buildings (house, lighthouse) made from tangram pieces. Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. 7 figures consisting of triangles, squares, and parallelograms are used to construct the given shapes.

Buildings Outline Tangram Card

Outlines of buildings (house, lighthouse) made from tangram pieces. Tangrams, invented by the Chinese,…

Solutions for outlines of buildings (house, lighthouse) made from tangram pieces. Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. 7 figures consisting of triangles, squares, and parallelograms are used to construct the given shapes.

Buildings Outline Solution Tangram Card

Solutions for outlines of buildings (house, lighthouse) made from tangram pieces. Tangrams, invented…

Silhouette outlines of buildings (house, lighthouse) made from tangram pieces. Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. 7 figures consisting of triangles, squares, and parallelograms are used to construct the given shapes.

Buildings Silhouette Tangram Card

Silhouette outlines of buildings (house, lighthouse) made from tangram pieces. Tangrams, invented by…

Solutions for silhouette outlines of buildings (house, lighthouse) made from tangram pieces. Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. 7 figures consisting of triangles, squares, and parallelograms are used to construct the given shapes.

Buildings Silhouette Solution Tangram Card

Solutions for silhouette outlines of buildings (house, lighthouse) made from tangram pieces. Tangrams,…

The serious, solemn, and awe-inspiring efect which the general arrangement of the temple produces is maintained by the smaller details, while the slanting form of the outer walls gives the temple an appearance of solidity and isolation. On this account, and especially owing to its simple unbroken lines, the exterior although monotonous and heavy, is still imposing. The chief peculiarity in the construction of these buildings is that they produce the effect of being composed of an agglomeration of separate parts, which resemble on another, but become smaller and smaller towards the rear of the structure.

Back View of the Temple of Philæ

The serious, solemn, and awe-inspiring efect which the general arrangement of the temple produces is…

An illustration of a tower.

Tower

An illustration of a tower.

Illustration of a leaning tower with a perpendicular drawn from the top of the tower to the ground to form a right triangle.

Leaning Tower

Illustration of a leaning tower with a perpendicular drawn from the top of the tower to the ground to…

Venice: House of Gold

Venice: House of Gold

Venice: House of Gold

A villa in Lucerne, Switzerland in 1907.

Swiss Villa

A villa in Lucerne, Switzerland in 1907.

A perspective of a potato warehouse.

Potato Warehouse

A perspective of a potato warehouse.

William and Mary College, Virginia

William and Mary College, Virginia

William and Mary College, Virginia

Wiring a small frame building.

Wiring a Building

Wiring a small frame building.

A species of masonry very common among the ancients, in which the stones are square and laid lozenge-wise, resembling the meshes of a net, and producing quite an ornamental appearance. It is the opus reticulate of the Romans.

Reticulated Work

A species of masonry very common among the ancients, in which the stones are square and laid lozenge-wise,…