Chișinău is governed by the City Council and the City Mayor, both elected once every four years. The current mayor is Dorin Chirtoacă. Ursu is the former vice-mayor, between August 1994 and April 2005 was Serafim Urechean. Under the Moldovan constitution, Urechean - elected to parliament in 2005 - was prevented from holding an additional post to that of an MP. The Democratic Moldova Bloc leader accepted his mandate and in April resigned from his former position. During his 11-year term, Urechean committed himself to the restoration of the church tower of the "Catedrala Naşterea Domnului", as well as improvements in public transport. From 1994, Chișinău saw the construction and launch of new trolley bus lines.