In 810, Doge Angelo Partecipazio moved the government from the island of Malamocco to the Rialto. The first palace was destroyed by a fire in the 10th century, which is in the 900s. A second palace was started by Doge Sebastiano Ziani (1172–1178). There are still parts of this building which can be seen on the ground floor, including stone wall bases and some brick paving. As Venice grew, the palace needed to be rebuilt to meet new demands. For example, changes in the political structure meant there were many more members of the Great Council. 