From the era of Ottoman rule, two structures remain that stand out with their distinctive appearance against the silhouette of the city. These are the two windmills of Nessebar.
One windmill is located on the northern shore of the resort, near the remains of a 6th-century basilica. The second windmill stands on the mainland, among the buildings of one of the modern hotels in the resort.
The body of the windmill has a regular cylindrical shape, with walls constructed from roughly cut local stone. Through the arched doorway, built of stone blocks, one enters the ground floor, which was originally used as storage. A staircase made of solid oak logs leads to the second floor, which served as a living space. A fireplace was built into the wall, with a chimney that runs through the full thickness of the wall to the outside.
The workroom of the windmill is located on the third floor. In the center are the still-preserved original millstones and the damaged skeleton of the simple yet cleverly constructed mechanism that harnessed the power of the wind. The conical roof, along with the mechanism, could rotate with the help of additional devices to align with the direction of the wind for maximum efficiency.