Osterias are wine bars that have evolved to serve simple meals. Traditionally, they are simpler than trattorias and usually have no menu. The offering changes daily, according to the market and two or three courses are offered for a fixed price, including wine.

The name osteria comes from the Latin word hospes ('someone who gives hospitality') from which the Old French words oste and ostesse derive, as well as the current Italian word oste, 'innkeeper'.

McWin Restaurant Fund is majority shareholder The third McWin Fund, the youngest in the company's history, becomes relevant for the majority stake in FR L'Osteria SE. The "McWin Restaurant Fund" (525 million euros) was launched in the fall of 2022 with the support of the Abu Dhabi Investment Authority (Adia).

The twin brothers Robert and Zhan Petrosyants, whom employees referred to as the restaurant's owners, are close friends of the Mayor.