Yes, for its historical significance and architecture, especially as a former church with a notable tower.
De Grote of Jacobijnerkerk (Grand Leeuwarden Cathedral) is a significant landmark in Leeuwarden, dating back to the 13th century. It served as the burial place for the Friesland stadtholders and features impressive historical elements. Visitors interested in Dutch history, especially the House of Orange-Nassau, and medieval church architecture will find it worthwhile. The church itself is not a cathedral in the traditional sense for the Roman Catholic Church, but rather a prominent Protestant church with a grand appearance.
While the interior might be less ornate than some cathedrals, its historical weight and the tales associated with it provide a rich visitor experience. The tranquil atmosphere also offers a pleasant respite. Check for special exhibitions or events, as these can enhance the visit considerably.