https://en.wikipedia.org/wiki/Pantheon_obelisk
In the pyramidion—the tip of the obelisk—there are two name cartouches of Pharaoh Ramses II. However, the 6.34-metre-high (20.8 ft) obelisk was also considered a work of the Roman period such as the obelisk in Piazza Navona. It stood in antiquity in Emperor Domitian‘s sanctuary of Isis; that is, in the immediate vicinity of the Pantheon.
The obelisk forms a pair with the granite stump Obelisco Matteiano in the Villa Celimontana; together, they once stood in the sanctuary of Amun-Re in Heliopolis.[1]