Quoting from architectural history
In the 19th century, interest in the ornamentation and architecture of the Middle Ages was common. Medieval churches were restored or expanded, and new buildings were designed in the style of the Middle Ages. After 1871, national pride and the glorification of the past grew. Buildings were made in the Gothic Revival style, and later in the styles of Renaissance Revival or Baroque Revival, and sometimes in an interesting mixture of all three! Grand Duke Friedrich I wanted early Gothic design elements for the exterior of the sepulchral chapel.