Modrý Kostol is a village in eastern Slovakia that is known for its unique blue church, which is also known as the Church of St. Elizabeth of Hungary. The church was built in the 14th century in the Gothic style and it has undergone several renovations over the years.

The church is characterized by its distinctive blue color, which was originally created using a blue plaster that was made from a special mixture of local minerals. The blue color was later restored in the 20th century using a blue paint that matches the original shade.

The interior of the church is decorated with frescoes and a Baroque-style altar that was added in the 17th century. The church also has a number of valuable works of art, including a Gothic statue of the Virgin Mary and a 17th-century crucifix.

Modrý Kostol is a popular destination for tourists who are interested in the unique architecture and history of the region. The blue church is a significant landmark in Slovakia and it is considered one of the country's most important cultural treasures.