As a result of the Great Northern War of 1700–21, the valley of Neva River became part of Russian Empire. On 16 May 1703, the city of St. Petersburg was founded in the mouth of Neva and became capital of Russia in 1712. Neva became the central part of the city. It was cleaned, intersected with canals and enclosed with embankments. In 1715, construction began of the first wooden embankment between the Admiralty building and the Summer Garden. In the early 1760s works started to cover it in granite and to build bridges across Neva and its canals and tributaries, such as the Hermitage Bridge.