What purpose do the obelisk of senusret and other obelisk serve
Obelisks were found mostly at the entrances to temples, but also next to tombs and often in pairs. They gave the entrance a "magical" protection. The obelisk of Senusret is today placed on a Roundabout in a city of El Fayoum.
Senusret I made several expeditions to the Sinai and Wadi Hammamat and he built there numerous shrines and temples. He erected 2 red granite obelisks to celebrate his Year 30 Heb Sed Jubilee. One of the obelisks is the oldest standing obelisk in Egypt. The obelisks primarily used to commemorate a pharaoh.