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 term “osteria” has its roots in Italy and was originally used to denote a place that served wine and simple food. The word “osteria” is derived from “oste”, which translates to “innkeeper” or “landlord” in English. This term was borrowed from the Old French word “oste”, which carries the same meaning.

The move is aimed at driving the chain's growth across Europe, with McWin investing alongside L'Osteria founders, Klaus Rader and Friedemann Findeis, and management. The exact size of the stake was not disclosed.

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