What is "quaglino's"

Quaglino's is a restaurant at 16 Bury Street, St James's, London, founded by Giovanni Quaglino in 1929. The restaurant achieved huge popularity with the British establishment in the 1930s through to the 1950s after which it entered a period of relative decline, being purchased by the Conran Group in 1993 and relaunched by D&D London in the 2010s.