Seili

Seili is an island in the Archipelago Sea, located in the municipality of Nagu, Finland. Administratively, it is part of the Southwest Finland region. Historically, Seili was known for its leper colony and later as a psychiatric hospital. The island's past is deeply intertwined with the history of healthcare in Finland.

The Seili island settlement began in the 17th century with the establishment of a lazaretto for leprosy patients, as it was considered isolated enough to contain the disease. Over time, the institution evolved, and in the 19th century, it became a hospital for the mentally ill. This facility operated for many years, significantly impacting the island's development and community.

Today, Seili is a popular tourist destination, particularly during the summer months. Visitors are drawn to its historical significance, its natural beauty, and the well-preserved old hospital buildings, which now house a museum. The island offers walking trails and opportunities for birdwatching. The former hospital chapel, dating back to the 18th century, remains a notable landmark. The island's unique history as a place of isolation and care continues to shape its identity.