In the Schlosspark, west of the carp pond, the neoclassical Mausoleum (1810) was conceived as the final resting place of Queen Luise but twice expanded to make room for other royals, including Luise’s husband Friedrich Wilhelm III and Emperor William I and his wife Augusta. Their ornate marble sarcophagi are great works of art. More royals are buried in the crypt (closed to the public).