Noah's ark, a building of gopher-wood, and covered with pitch, 300 cubits long, 50 cubits broad, and 30 cubits high (Gen. 6:14-16); an oblong floating house of three stories, with a door in the side and a window in the roof. It was 100 years in building (Gen. 5:32; 7:6). It was intended to preserve certain persons and animals from the deluge which God was about to bring over the earth. It contained eight persons (Gen. 7:13; 2 Pet. 2:5), and of all "clean" animals seven pairs, and of "unclean" one pair, and of birds seven pairs of each sort (Gen. 7:2, 3). It was in the form of an oblong square, with flat bottom and sloping roof. Traditions of the Deluge, by which the race of man was swept from the earth, and of the ark of Noah have been found existing among all nations.

The ark of bulrushes in which the infant Moses was laid (Ex. 2:3) is called in the Hebrew _teebah_, a word derived from the Egyptian _teb_, meaning "a chest." It was daubed with slime and with pitch. The bulrushes of which it was made were the papyrus reed.

The sacred ark is designated by a different Hebrew word, _'aron'_, which is the common name for a chest or coffer used for any purpose (Gen. 50:26; 2 Kings 12:9, 10). It is distinguished from all others by such titles as the "ark of God" (1 Sam. 3:3), "ark of the covenant" (Josh. 3:6; Heb. 9:4), "ark of the testimony" (Ex. 25:22). It was made of acacia or shittim wood, a cubit and a half broad and high and two cubits long, and covered all over with the purest gold. Its upper surface or lid, the mercy-seat, was surrounded with a rim of gold; and on each of the two sides were two gold rings, in which were placed two gold-covered poles by which the ark could be carried (Num. 7:9; 10:21; 4:5,19, 20; 1 Kings 8:3, 6). Over the ark, at the two extremities, were two cherubim, with their faces turned toward each other (Lev. 16:2; Num. 7:89). Their outspread wings over the top of the ark formed the throne of God, while the ark itself was his footstool (Ex. 25:10-22; 37:1-9). The ark was deposited in the "holy of holies," and was so placed that one end of the poles by which it was carried touched the veil which separated the two apartments of the tabernacle (1 Kings 8:8). The two tables of stone which constituted the "testimony" or evidence of God's covenant with the people (Deut. 31:26), the "pot of manna" (Ex. 16:33), and "Aaron's rod that budded" (Num. 17:10), were laid up in the ark (Heb. 9:4). (See TABERNACLE.)