The Ark of Bukhara is a massive fortress located in the city of Bukhara, Uzbekistan, that was initially built and occupied around the 5th century AD. The Ark's current structure began to develop during the 16th century under the Shaybanid Uzbek dynasty, while all of its existing buildings were constructed in the last three centuries. In addition to being a military structure, the Ark encompassed what was essentially a town that, during much of the fortress's history, was inhabited by the various royal courts that held sway over the region surrounding Bukhara. The Ark was used as a fortress until it fell to Russia in 1920. Currently, the Ark is a tourist attraction and houses museums covering its history. The museums and other restored areas include an archaeological museum, the throne room, the reception and coronation court, a local history museum, and the court mosque.