The church of Our Lady of the Snows (Czech: Panny Marie Sněžné) is located near Jungmann Square in Prague, Czech Republic. This church has one of the highest vaults in Prague (34 metres (112 ft)). It was supposed to be the second biggest church in Prague (after St. Vitus Cathedral), but it was not completed. The current form consists only of the presbytery of the church.
The church along with a monastery of the Carmelite order was founded in 1347 on the occasion of the coronation of Charles IV and his wife Blanche of Valois. The Carmelites were a mendicant order since 1245, which meant that they were not allowed to own any land. They therefore had no sources for building the church. Charles IV donated them a large plot, which they could partly rent, and the wood which had been used to build his coronation hall. This, along with contributions from the citizens of Prague, was enough to construct the currently visible part of the building. The construction of the church was delayed because of the problems with funds.
During the Hussite Wars the construction was interrupted, the church was heavily damaged, and the local monks left the monastery. The church fell into disrepair by the end of the 16th century. At the beginning of the 17th century the church was taken over by the Franciscans to whom the church was given by the King of Bohemia Rudolf II.
In 1611, during the Passau army incursion, fourteen monks were killed, when a rabble from the city of Prague attacked and looted the monastery. These monks are known as Fourteen Prague Martyrs. They were after almost 400 years beatified in 2012.
The church itself was modified during the Renaissance and Baroque (mostly in the second half of the 17th century).
Today, the Gothic presbytery serves as a church of Franciscans. The northern aisle is accessible from the eastern corner of the Jungmann square through the gate which originally led to the cemetery behind the church.
t:source: http://cs.wikipedia.org/wiki/Kostel_Panny_Marie_Sněžné_(Praha)