The oldest houses on Lastovo date back to the 15th century.
The locals showed their wealth by decorating unique and pitoresque chimneys. There are no two identical chimneys. By decorating the chimneys, the people of Lastovo competed with each other. The animal horns rotected them against spell. The oldest chimney belongs to the Antica - Biz family in Lastovo.
21 churches are registered as a protected cultural heritage. The Islanders built them with the saints as a protection against the adversity and illness. The oldest church - the old Christian basilica in Ubli dates from the 6th century, and the oldest preserved church is St. Luka from the 11th century The parish church of St. Cosmas and St Damian in Lastovo was built in the 15th century and was extended in the 17th century.