For ten points, name this largest island in the Baltic Sea.
The Faro Strait separates this island from its closest neighbor to the north. Lake Basterask is the largest lake on this island, which is near the much smaller Karslo islands. This island is home to the Burgsvik beds, in which many fossilized sea creatures may be found. The Ireviken, Mulde, and Lau extinction events are named for towns on this island, which is an excellent source of Silurian sedimentary deposits. This island's capital and largest city is Visby, and this island formerly served as the headquarters of the Victual Brothers and the Likedeelers. Though closest to Latvia, this island is controlled by Sweden. For ten points, name this largest island in the Baltic Sea.
The Faro Strait separates this island from its closest neighbor to the north.
{Gotland}