Trosa received its ”township” status from King Karl IX of Sweden in 1610. In 1719, Trosa was burned down by Russian invaders.

The town church was consecrated in 1711 and was spared from the fire by the Russians as they used it as a stable, it is one of the oldest preserved buildings in Trosa.

The cottage “Åbladsstugan” (located on Östra Långgatan) was built after the fire and is the only preserved “Skärborgarstuga” (Fisherman’s cottage).

The ancient monument Garvaregården (the Tannery) is an arts and crafts house from the 18th century. The tanning activity was run here until the beginning of the 20th century. The local Culture Association is responsible for the town museum and its unique collections. The Tanner’s house and his workshop can be seen. There is also a café and a handicraft shop open during the summer season.

The harbour ends at a stone pier called The Butter Bucket. When you arrive there you have reached “World’s End” and can go no further. This nickname for Trosa arises from it’s location at the end of the long peninsula.