New Castle Historical Society
The organization is the launching point for various guided and self-guided tours of the historic district, including a garden and haunted tours, and visiting the society's three museums that trace New Castle history from 17th-century Dutch settlers to modern-day efforts to preserve the past. Dutch House features Dutch colonial artifacts related to early port activities. The Georgian-style Amstel House, circa 1730, is considered Delaware's first grand mansion and hosted George Washington and signers of the Declaration of Independence. Old Library Museum, built in 1892, is a hexagonal brick structure designed by noted architect Frank Furness of Philadelphia.
