Sebastiano Ziani was Doge of Venice from 1172 to 1178. He was one of the greatest planners of Venice. During his short term as Doge, Ziani divided the city-state into many districts. He realised that the government headquarters were too close to the shipyard. As such, they were affected by the noise from the shipyard. Ziani resolved this problem by donating a piece of land to the city-state and relocating the shipyard in it. One of the most notable changes he made to the city was in funding the construction of the Piazza San Marco. Projects included filling up Rio Batario that ran parallel to the Basilica San Marco which could be found at what is today the half way point of the Piazza. He paved the main square as well as the Piazzetta that it is connected to. Ziani hired an engineer to ere