Originally posted by pipo.p:

Since when? Roman empire or before? By what name? I am interested.

Saint Nicholas of Myra (Νικόλαος Μυριώτης in ancient greek), which then got shortened to Santa Claus or just Santa in modern folklore; exact dates of birth and death are disputed, most often you will find 15 March 270 – 6 December 343. It was roman empire then.