The Treasury (also known as Al Khazneh, sometimes spelled Al Khazna) is probably the most famous of all the monuments in the ancient city of Petra. Despite its name, the Treasury does not house any treasure but a funerary chamber. Archeologists believe that the 130-foot-tall ornate structure was the tomb of a first-century Nabataean king.
The Monastery (known as Al-Dayr), whose architectural details resemble that of the Treasury, was also a tomb but was used as a church under the Byzantine Empire. Inside the Monastery are benches and an altar.