The first church was built on the site of current Cathedral of the Annunciation in 1397 by order of Grand Duke Vassily I. The present building dates from 1484, when Ivan III (the Great), the great Muscovite empire-builder, ordered a new cathedral. It was completed in 1489 by Krivtsov and Mishkin, masons from Pskov, who blended Greek and Russian styles in their design.
Generations of princes and tsars added to and altered the Cathedral. Ivan IV (the Terrible) had the cathedral rebuilt in the 16th century and added four small side chapels, each with a single dome, while two more domes were added at the rear of the building and all nine domes were gilded. The Tsar was put under church penance when he married for the fourth time (three was the maximum the church would tolerate), and not allowed inside. This led to the construction of a new porch for him to stand under during services.
The cathedral is famous for its magnificent iconostasis, shielding the sacred part of the church from view. Icons by various artists from the 14th to 19th centuries make up the screen. Icons on the diesis (prayer) tier are ascribed to the legendary Russian Painter Andrei Rublev, the greatest of the Russian icon-painters (whose work can also be seen in the State Tretyakov Gallery) and Theosofanus the Greek, possibly Rublev's mentor, with whom he frequently collaborated.
The Cathedral of the Annunciation was originally built as the domestic church of the Grand Dukes and tsars and was connected (along with the Cathedral of the Archangel) by passages to the private quarters of the royal family. The cathedral was used to celebrate name-days, weddings, baptisms and so forth. The Cathedral of the Annunciation was badly damaged during the Revolution, when the Kremlin came under attack from artillery fire. In 1918, the cathedral was closed as a place of worship and now it operates officially as a museum.
References:The Clementinum is a historic complex of buildings in Prague. Until recently the complex hosted the National, University and Technical libraries, the City Library also being located nearby on Mariánské Náměstí. The Technical library and the Municipal library have moved to the Prague National Technical Library at Technická 6 since 2009. It is currently in use as the National Library of the Czech Republic.
Its history dates from the existence of a chapel dedicated to Saint Clement in the 11th century. A Dominican monastery was founded in the medieval period, which was transformed in 1556 to a Jesuit college. In 1622 the Jesuits transferred the library of Charles University to the Klementinum, and the college was merged with the University in 1654. The Jesuits remained until 1773, when the Klementinum was established as an observatory, library, and university by the Empress Maria Theresa of Austria.