Dominican Cathedral and Monastery is one of the most important and beautiful architectural monuments in Lviv, built in Baroque style. It is located at Museum Sq., 1. The temple is known as the Temple of the Holy Eucharist since in 1990 it was turned over to the Ukrainian Greek Catholic Church. In its walls there is the famous Museum of Religion and Atheism, opened in 1972, as well as creative association "Dzyga".

The Dominican Church, now the Greek Catholic Church of the Holy Eucharist, is a magnificent monument of the late Baroque; it is adorned with original sculptures.

The Dominican Monastery was founded here in the 13th century upon the request of the wife of Ukrainian Prince Lev Danylovych - the Hungarian Princess Constance, a Catholic, who missed her religion being far from home. A Gothic church stood here from the 15th until the middle of the 18th century.

In 1559, a true war for the bride, using artillery and all the subtleties of military strategy, flared up in this church and on the opposite square . The magnate Lukasz Gurka sought the expulsion of his legitimate (as he believed) wife from the monastery. Halshka Ostrozka, the wealthiest heiress of Rzeczpospolita, had found asylum in the Dominican Monastery. During the military actions all trade in Lviv ceased for several weeks, so the exasperated king ordered a stop to the fighting. A water-pipe leading to the monastery was severed, and this put an end to the siege: Halshka was surrendered to Lukasz.

In 1748, the Gothic Dominican Church was dismantled because it was in bad disrepair. In 1748-1764, a new church resembling the Karlskirche in Viennawas built in the late Baroque style; it was designed by the military engineer and artillery general Jan de Witt. At the time tradition required that everything valuable from the previous church be preserved.. As a result, today we can view the alabaster gravestone dating back to the 16th century – a reminder of the old Gothic church that vanished 260 years ago.

For the first time the Dominican church and monastery appeared in Lviv in 1370-1375. They were erected on the project of Nicholas Czech. After almost four centuries, in 1749, on this place there was founded the new cathedral, the architect of which was Jan de Witt. The building was financed by Polish Hetman Jozef Pototski, and the construction of the church lasted for more than 10 years. Since 1865, the Cathedral had been constantly restored and rebuilt: in 1865 there was attached the Bell Tower, which had four tiers, and was built in Baroque style, in 1895 there was reconstructed the dome, and from 1905 to 1914 there were carried out the restoration works inside the church.

Dominican cathedral is built of stone and has the form of the elongated cross with the central part in the form of an oval. The altar is made in the form of rectangle, and the top of cathedral is decorated with dome, supporting 8 pairs of twin columns. The pediment has amazing sculptures, made at different angles. The architecture of the church was influenced by the churches of Rome, Vienna and Bologna.

The interior of the cathedral is designed in the Baroque style. The altar is decorated with four large statues, galleries and balconies – with wooden statues, created by Lviv sculptors. In the church there are several monuments of art, that’s why so many tourists enjoy visiting this temple.

The monastery cells are attached to the Dominican monastery; they were rebuilt in 1621 and restored after fires in 1766 and 1778 years. The cells, like church, are built of stone, have a rectangular shape and rise up to 3 floors. The monastery is known for the fact that here was kept the statue of the Virgin of St. Jacek, it was the shelter for Galshka Ostrog, the heiress of the Ostrog princes, here was signed a peace treaty between Russia and Rzeczpospolita, which united to fight against Sweden.

The Dominican Order first arrived in Lviv during the 13th century and the first wooden church is said to have been built in 1234 within the Low Castle, founded by the wife of Leo I of Halych. That church burned down during a war in 1340. A new Gothic church, resembling the parish church in Kazimierz Dolny, was built on the present site in 1378 and later rebuilt after a fire in 1407 along with the monastery buildings. During the 16th century the complex was ravaged by several fires, nevertheless it continued to gradually rise in prosperity. In the 18th century the churches ceiling started cracking and it was decided in 1745 that the church has to be taken apart and replaced with a new one.

In 1749 Józef Potocki laid the corner-stone for the present day Baroque church, commonly attributed to Jan de Witte. The church was consecrated in 1764 by the Latin archbishop of Lviv Wacław Hieronim Sierakowski. The Dominicans managed to safely survive through the reign of the Austrian emperor Joseph II, who closed many other monasteries. In 1865 a neo-baroque bell tower was added to the complex. In the years 1885-1914 a controversial renovation of the facade and interior was carried out.

After World War II the complex was occupied by soviets, used as warehouse and in the 1970s changed into a museum of religion and atheism. With the collapse of the soviet union the church was given to the Ukrainian Greek Catholic Church and now serves as a parish church, the monastery however has not been returned yet and still serves as a museum (renamed as the museum of religion).

The church resembles the church of St. Charles Borromeus in Vienna. It's built on the plan of the Greek Cross inscribed in an ellipsoid and topped with a monumental dome.

Before 1946 the church contained a wonder working icon of the Blessed Virgin Mary, crowned by Pope Benedict XIV in 1751, which can today be found in the Dominican church of St. Nicholas in Gdańsk and an alabaster figure brought by St. Hyacinth from Mongol sacked Kiev to Halych and later to Lviv, today can be found in the church of St. Giles in Kraków.