The Castle of Zakynthos was completed by the Venetians in 1646 AD and the Winged Lion of Saint Mark, a symbol of the Venetian empire, stands above the main entrance. In those times the castle was the seat and residence of the Venetian Proveditor, administrator of the island, and other officials. Due to time, war attacks and earthquakes, the castle was partly damaged.
When the British Empire took over the Ionian islands in 1812, the castle was reconstructed and new buildings were built, including barracks, powder stores and the house of the British Parliament.
Many churches were also found inside the castle walls, such as the Byzantine Church of the Savior (San Salvatore or Domo) that dates from the 12th century, the 14th century Church of Saint Francis, the church of Santa Barbara, the church of the Virgin Mary Laurentena and the church of Saint John the Baptist.
References:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.