‘Returning to Hisarlik: Carl Blegen and Manfred Korfmann’ details more recent excavations of the city of Troy. Carl Blegen began excavations in 1932. He believed that the destruction of Troy VI was caused by an earthquake, and that it was Troy VIIa that was destroyed by warfare. However, the date of Troy VIIa was too late for it to have been destroyed by the Mycenaeans. Manfred Korfmann continued excavations at the site in the 1990s. Magnetometer survey discovered the existence of a massive lower city, destroyed by war at the time of Troy VIIa. Responsibility for this military devastation is unclear, however, and Korfmann's findings have been questioned.