Pazaislis Monastery is a 17th-century Baroque-style complex located in the city of Kaunas, Lithuania. It was built between 1662 and 1674 as a Catholic monastery for the Order of the Camaldolese Hermits, following the commission of Grand Hetman of Lithuania, Kristupas Zigmantas Pacas. The monastery is known for its stunning architecture, interior decoration, and the surrounding picturesque landscape.

The monastery is situated on a hill overlooking Lake Kaunas, surrounded by a large park and gardens. The main building of the monastery is adorned with stucco decorations, frescoes, and sculptures, all made by Italian artists. The interior of the monastery is no less impressive, featuring high ceilings, lavish decoration, and a striking central nave.

In the 18th century, the monastery was taken over by the Russian Orthodox Church and used as a monastery for nuns. During this time, several modifications were made to the building, including the addition of an onion-shaped dome to the church. In 1915, during World War I, the monastery was damaged by German forces, and in the following years, it was used for various purposes, including a military hospital, a school, and a prison.

In the 1990s, after Lithuania regained independence from the Soviet Union, the monastery was returned to the Catholic Church and underwent a major renovation. Today, Pazaislis Monastery is a popular tourist attraction, hosting concerts, art exhibitions, and cultural events throughout the year. The monastery also houses a museum dedicated to the history and architecture of the complex.