The Heliopolis Obelisk, 1878 

The oldest standing ancient Egyptian obelisk in existence, this example dates from the reign of the 12th Dynasty king Senusret I, who ruled from 1971 to 1926 BC. It was one of a pair erected to commemorate the Heb Sed (30th Jubilee) of Senusret I.

It still stands in its original position, now within Al-Masalla in Al-Matariyyah, Cairo. From Album of Photographs, Egypt, by Félix Bonfils, 1878.