The Pharaoh Headdress is treasure that can be obtained in Sly Cooper: Age of Thieves in the episode Rob Like an Egyptian. It is worth 287 coins and the time it takes to get to the safehouse is fifteen seconds.
"This old headdress was once one of many possessions stolen by Slytunkhamen. As a matter of fact, it was one of the last things Slytunkhamen stole before all of the time-related problems started. It may seem like a bit much, but wearing it certainly makes thieves feel important."
It is located on top of the sphinx. Penelope is the only character capable of reaching this treasure.