The Maritime Museum occupies the Custom House on St George's Quay, a fine Georgian building designed by Richard Gillow in 1764 — the same Gillow whose furniture workshop became the famous Gillows of Lancaster. The location is deliberate: this is where Lancaster's maritime trade was administered, and the museum takes that history seriously.
The centrepiece is Lancaster's role in the Atlantic slave trade, handled with directness and backed by documentary evidence. Lancaster was England's fourth-largest slaving port in the 18th century, and the museum names the ships, the merchants, and the human cost. Alongside this is material on the fishing trade, the Lancaster Canal, and Morecambe Bay.
St George's Quay itself is attractive — a Georgian stone waterfront with surviving warehouses — and worth a walk even if you skip the museum. Small admission charge; free for under-16s.