Poi Kalyan (Poi Kalon аnsambli) — the architectural complex located at the bottom of a minaret Kalyan. The complex consists of three constructions constructed in the XII—XVI centuries: minaret Kalyan, mosque Kalyan and madrasah of Miri Arab. Give to drink Kalyan is on the ceremonial square Registan and is the central architectural complex of Bukhara.

History
The cathedral mosque with a minaret were in Bukhara from the moment of gaining Transoxascientific research institute by Arabs in VIII, there was a mosque at the bottom of a city citadel. In the 12th century Arslan the khan conceives grandiose reorganization of the city: it sorts the city palace which was on Bu-Liaysa Street, recreates the citadel ruined by this time and transfers the city mosque. The new mosque is under construction approximately in hundred fifty meters to the southeast from a citadel, and at it the minaret is built. The minaret was, according to Narshakhi "is beautifully made", but it was made unsteadily: at once upon termination of construction the minaret falls on the mosque and two thirds destroy it. In 1121 finish the new mosque, and in 1127 — the minaret which reached our days.
On the place of the mosque Arslan of the khan in the 15th century the present mosque Kalyan is built, its finishing comes to the end in 1514, about it the inscription on a building facade says. The ensemble takes a modern form in the 1536th year when Ubaydulla-han builds madrasah on the advice of the confidant of Miri Arab Iyemensky. After death of Miri of the Arab his tomb is erected in the yard of the madrasah called in his honor, also Ubaydulla is based here.
Architectural features
The square is located near the Bukhara Registan, coming a northern end face to one of the central city streets. The mosque and madrasah are on one line facades to each other, forming kosh.
Minaret Kalyan
Minaret Kalyan (Minorai Kalon — big) or the Big Bukhara minaret — the most ancient the building on the square, it was constructed in 1127 Arslan by the khan and in nearly 900 years was never under repair. A minaret — one of the highest buildings of Bukhara, its height of 46,5 meters with the lower diameter of 9 meters, a construction of conical shape with a lamp above. The minaret is ornated — the cylindrical body is laid out by strips of a flat and relief laying, revealing rotundity of a construction at any lighting. The dome of a lamp did not remain.
Mosque Kalyan
The mosque Kalyan (Masjidi kalon — "The big mosque") — the Bukhara cathedral mosque, is built at Ubaydulla-hane on the place of the collapsed karakhanidsky mosque, construction is ended in 1514, the mosque, the second for the size, in Central Asia after Bibi Hanum's mosque in Samarkand. It is executed in traditions of timuridsky architecture and decorated with an irrigation mosaic.
Madrasah of Miri Arab
The madrasah of Miri the Arab (Madrasa Mir-i Arab — "Emir the Arab") — madrasah, is constructed by Ubaydulla-hanom for the sheikh Abdullah Yemensky in 1535 — 1536. The building rather large — concludes in itself 111 hudzhr and two crosswise halls: the first hall was used as the mosque and the lecture hall, the second was a tomb of Ubaydully-hana, Abdullah Yemensky and other.