Richthofen's identification of Cattigara as Hanoi was widely accepted until archaeological discoveries at Óc Eo (near Ho Chi Minh City) in the Mekong Delta during the mid-20th century suggested this may have been its location.
Identifikasi Richthofen dari Cattigara sebagai Hanoi banyak diterima sampai penemuan-penemuan arkeologi yang didapat di Óc Eo (dekat Ho Chi Minh City), Delta Mekong pada pertengahan abad ke-20 menandakan bahwa tempat tersebut merupakan lokasinya.