Linz Castle is a historic fortress located in Linz, Austria. Originally built in the 9th century, it has served various purposes over the centuries, including as a royal residence and military stronghold. The castle features a mix of architectural styles, reflecting its long history and numerous renovations. Today, Linz Castle houses the Linz Castle Museum, which showcases the region's history and culture. Visitors can explore its impressive towers and enjoy panoramic views of the Danube River and the surrounding city. The castle remains a significant landmark in Linz, attracting tourists and history enthusiasts alike.