Like it's name suggests, it is the first Lovian McDonald's restaurant.
The restaurant started out as a fancy restaurant called Le Bonaparte. Jack Ames was the boss, and his daughter Emily was the waitress. In 1991, Jack became financially unstable and sold it to McDonald's United Kingdom, who turned it into a McDonald's restaurant one year later, in 1992.
The original name is still on the roof of the building as McDonald's Lovia hasn't bothered to change it. The restaurant's basement also still contains a stack of books presumably owned by Jack Ames but never reclaimed, one book containing a small picture of Emily.