The Hofburg is a historic palace complex located in the heart of Vienna, Austria. Originally built in the 13th century, it served as the winter residence of the Habsburg dynasty. The complex features various architectural styles, reflecting its long history and the different rulers who expanded it over the centuries. Today, the Hofburg houses several important institutions, including the Austrian President's office, the Austrian National Library, and the Imperial Apartments. Visitors can explore its museums, such as the Sisi Museum, which showcases the life of Empress Elisabeth, and the stunning Imperial Chapel.