Prophet's Tomb + Mosque

TLDR: Sunnis have added the prophet's tomb to his mosque, making his tomb a place of worship, and also have inundated the walls of his mosque with his glorification. They have made the prophet's mosque the second Holy Shrine, even though this is not recognized in the Quran. They also have made visiting the prophet's mosque in Medina as a part of Hajj.

People praying, prostrating, and doing Salat to the prophet's tomb

The names of Prophet Muhammad painted on the walls of Masjid Nabawi (bottom row)