Riddarholmen Church is a historic church located on the island of Riddarholmen in central Stockholm, Sweden. It is one of the oldest buildings in Stockholm and was originally built as a Franciscan monastery in the late 13th century. The church was later converted into a Protestant church in the 16th century and has since been used as a royal burial church.

The church is known for its Gothic architecture and is considered to be one of the best-preserved medieval buildings in Stockholm. The church's interior features intricate vaulted ceilings, stained glass windows, and elaborate sculptures.

The Riddarholmen Church is the final resting place of many Swedish monarchs, including Gustav II Adolf, Karl XII, and Gustav V. The church also houses several impressive tombs and memorials, including the tomb of Birger Jarl, the founder of Stockholm, and the memorial to Raoul Wallenberg, a Swedish diplomat who saved thousands of Jews during World War II.

Today, the Riddarholmen Church is open to the public and is a popular tourist destination. It is also used for state occasions and royal funerals.