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column

(Encyclopedia) column, vertical architectural support, circular or polygonal in plan. A column is generally at least four or five times as high as its diameter or width; stubbier freestanding masses…

U.S. Landmarks Timeline

Find out when some of the most historical sites in the U.S. became national landmarks. by Jennie Wood The U.S. began the National Historic Landmark Program to recognize and preserve the…

Roman roads

(Encyclopedia) Roman roads, ancient system of highways linking Rome with its provinces. Their primary purpose was military, but they also were of great commercial importance and brought the distant…

Rio Grande, river, United States and Mexico

(Encyclopedia) Rio GrandeRio Granderēˈō grănd, rēˈō gränˈdē [key], river, c.1,885 mi (3,000 km) long, rising in SW Colo. in the San Juan Mts. and flowing south through the middle of N.Mex., past…

sand

(Encyclopedia) sand, rock material occurring in the form of loose, rounded or angular grains, varying in size from .06 mm to 2 mm in diameter, the particles being smaller than those of gravel and…

arch

(Encyclopedia) CE5 Arches arch, the spanning of a wall opening by means of separate units (such as bricks or stone blocks) assembled into an upward curve that maintains its shape and stability…

Jackson

(Encyclopedia) Jackson. 1 City (1990 pop. 37,446), seat of Jackson co., S Mich., on the Grand River; inc. 1857. It is an industrial and commercial center in a farm region. The city's chief…

Albany, cities, United States

(Encyclopedia) Albany Albany 1, 3, 4 ôlˈbənē; 2 ôlˈbĕnˌē, ălbāˈnē [key]. 1 Residential city (2020 pop. 20,271), Alameda co., W Calif., on the eastern shore of San…

fortification

(Encyclopedia) fortification, system of defense structures for protection from enemy attacks. Fortification developed along two general lines: permanent sites built in peacetime, and emplacements and…

July 2006

WorldDozens Are Killed at Iraqi Market (July 1): More than 60 people are killed by a suicide bomber in a Shiite neighborhood in Baghdad. A Sunni member of parliament, Tayseer Najah al-…