In the non-populated northern area was the huge Mausoleum of Augustus. Other buildings that were made were the Theatre of Marcellus, the Temple for Isis (from around the time of Caligula), the baths and bridge by Nero, and Pompey's Theatre, where Julius Caesar was murdered by Marcus Brutus and his allies. After the great fire of 64 A.D. Domitian rebuilt the burnt monuments plus a stadium (eventually to become today's Piazza Navona) and an Odeion (a small performance hall). In 119 A.D, reinforcing the themes of imperial divinity and apotheosis established by Augustus, Hadrian and the succeeding Antonines added a temple to Hadrian's mother-in-law, the Divine Matidia, and a temple to the Divine Hadrian himself built by Antoninus Pius.