1. Who first built the houses along the East River front in Manhatten that later became tenement housing?
of the house move away?

Explanation:

Tenements were first built to house the waves of immigrants that arrived in the United States during the 1840s and 1850s, and they represented the primary form of urban working-class housing until the New Deal. A typical tenement building was from five to six stories high, with four apartments on each floor.

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