Sultans of the Ottoman Empire has always cared about decorating original buildings of their possessions and paid great attention to the creation of magnificent mosques throughout the Caliphate. Traveling on the territory of the state, they were ordered to build a particular building on the occasion of his visit. Most often, it was a mosque, madrasah or Tekke (rooms for priests). In addition, the sultans encouraged their rich citizens to invest in the construction of religious and charitable institutions. With this scope in the construction of the Empire was even introduced a special position - the chief architect of the Sultan. Thus, it is believed that the mosque Bayezid II built the architect Hairettin. But given the absence of any historical documents confirming this, some historians believe the creator of this magnificent Külli Yakup Shah bin Sultan Shah.

Construction Külli and Mosque of Sultan Bayezid II was the beginning of spring 1484, when the governor of Edirne stopped in front of a military campaign in Moldova. On his orders, the complex was built on the right bank of the river Tundzha and included a guest house, a soup kitchen for the poor, a hospital, madrassa, hammam, a mill, as well as the bridge over the river. Külli area exceeds 22 thousand square meters. Most of the construction is similar to the "Muslim monastery", but the complex was also designed for the treatment of the mentally ill, drug development, medical education.

From an architectural point of view, the most interesting building complex is a mosque with two minarets. Their height is 38 meters and the diameter is approximately three meters. The mosque is decorated with a large dome (diameter 20, 55 m), relying on the icosahedral drum area of ​​about 500 square meters. meters. In addition, the dome rests on four massive columns with stalactite peaks. Total number of domes on all buildings Külli over a hundred. Swimming pool for ablutions brought outside the room - the courtyard, the perimeter of which is covered by small domes bypass gallery. It should be noted that the architects of the time trying not to remove trees from construction sites, so in the courtyard of the Mosque of Bayezid II was abandoned a few cypress trees that adorn the entire ensemble.

The mosque has an unusual layout. At the entrance to her room right and left open the two wings, forming a kind of vestibule with vaulted arcades. Long Gallery of the mosque resembles a medieval monastery refectory. Domes Külli covered with lead plates, and on the spire erected a golden crescent. Despite the fact that the mosque is one of the burial, turbot (from Turkish. - "Tomb") is behind the mosque.

Located on the territory of Külli Bayezid II Hospital it was very popular and serves patients for almost four centuries, until the Russian-Turkish war. It worked as the general practitioners and narrowly focused specialists: ophthalmologists, surgeons and pharmacists. The hospital was also a special section for the mentally ill - tymarhane (which means "mental hospital"). In the treatment of those suffering used an unusual technique at the time: to use national music, the melodious sound of water, aromatherapy. In 1984, the buildings were transferred to the University Hospital of Trakia and after repair they were used for the learning process. In tymarhane in 1997. The museum was opened on health. Its interesting exhibition allows us to represent the level of development of medicine in the Ottoman Empire.