Established in 1919 by one of the very few female chocolatiers in Belgium, Mary Delluc, this traditional purveyor of pralines started life as a tea room. It has a delightfully old-fashioned air reflected in the sublime taste of its gourmet chocolates and in its pretty packaging, which has remained largely unchanged since the 1920s. From its small beginnings in rue Royal, the Mary empire has now spread as far afield as South Africa and Kazakhstan.