CLAY—

Clay is one of the most ancient materials used for building, storage, and records. It was shaped into vessels, bricks, and tablets long before metal tools were common. It formed storage containers, roof tiles, drainage pipes, and structural walls in early settlements.

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In early river civilizations, administrative records were pressed into wet clay and hardened through firing. Laws, trade accounts, inventories, and contracts were preserved in ceramic form. Clay tablets remain among the earliest surviving written documents. 

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Control of fired clay altered the scale of construction. Brick allowed settlements to expand beyond timber and thatch. Fired material resisted rot, insects, and weather more effectively. Kilns introduced consistent heat, producing stronger and less porous ceramics.

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Across the Mediterranean and later throughout Europe, clay was used for amphorae, tiles, sewer pipes, and architectural ornament. It supported storage, trade, sanitation, and urban growth.

In colonial and early industrial New England, clay beds supplied brickworks and potteries. Kilns operated near riverbanks where deposits were accessible and transport was practical. Fired brick shaped mills, factories, row houses, and civic buildings throughout the 18th and 19th centuries.