Tersâne-i Âmire was the Imperial shipyard, on the Golden Horn. The shipyard was founded on the Golden Horn in 1453, after the Ottoman conquest of Constantinople, and initially called the Galata Shipyard. In the 16th century it became known as the Tersâne-i Âmire and was greatly expanded, with 140 docks and a perimeter wall to keep prying eyes away from naval secrets; it took over from the main shipyard at Gallipoli. From this time on, the Tersâne-i Âmire was at the heart of shipbuilding and naval governance in the Ottoman Empire. However, the shipyard suffered ups and downs with the rest of the empire. There were reforms and expansions after the Battle of Lepanto in 1571; in 1601 the shipyard had 3524 employees but this steadily fell to 726 in 1700; during this period an increasing amount of work was done by other shipyards. By the reign of Abdulmejid I (r. 1839–1861), the Tersane-i Amire had fallen into neglect and underinvestment; Abdülmecid started a massive investment programme which modernised not just the Tersane-i Amire but also shipyards in Izmit and Gemlik.