Mausoleum

A building in which the bodies of dead people are buried.

A mausoleum is an external free-standing building constructed as a monument enclosing the interment space or burial chamber of a deceased person or people. A monument without the interment is a cenotaph. A mausoleum may be considered a type of tomb or the tomb may be considered to be within the mausoleum. A Christian mausoleum sometimes includes a chapel.

"the cathedral was built in 1517 as a royal mausoleum"