It was inscribed on the UNESCO World Heritage List in 1991 because of its unique wooden architecture and its well-preserved medieval town layout.

[1] The oldest buildings date from the 18th century, as two fires in 1640 and 1682 destroyed much of the town.

However, the layout of the town center still retains much of its medieval structure.

[1] Although Old Rauma was almost completely destroyed by fires, a few buildings and ruins survive from medieval times.

[2] The only other ancient stone building is the Old Town Hall, which was constructed in 1776.