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"Arabic Architecture.-Tombs of the Califs, Cairo."-Whitney, 1902

Arabic Architecture

"Arabic Architecture.-Tombs of the Califs, Cairo."-Whitney, 1902

The signature of the prophet, Mohammed.

Mohammed's Signature

The signature of the prophet, Mohammed.

An irrigation tool invented by the people of ancient Sumer. It uses weights to make lifting buckets of water almost effortless.

Shadoof

An irrigation tool invented by the people of ancient Sumer. It uses weights to make lifting buckets…