Károly Gundel, restaurant manager took over Wampetics Restaurant in the City Park in 1910, before later renting the restaurants of the Royal- and Gellért Hotels too.

He wrote multiple culinary books, and popularized Hungarian cuisine both nationally and internationally through his participation in chef exhibitions and expos, and in the meantime boosted tourism as a result. As a testament to his leadership in the restaurant and hotel business, his was the official restaurant at the Hungarian pavilion in the 1939 World Fair in New York. His restaurant at the Zoo avenue is the most highly venerated restaurant of Hungary to this day.