The unfinished obelisk of Aswan is known to be the largest obelisk in Egypt. It was constructed by Hatshepsut (18th Dynasty).
The Obelisk is 4 sided, tapered monument, it was known as tḫnw.
It is made out of granite quarry in Aswan. If it was completed, it would have been the heaviest obelisk ever cut in Ancient Egypt. The project never finished because of numerous cracks within the granite.