"St. Petersburg" is actually used as an English equivalent to three variant forms of the name: originally Санкт-Питер-Бурх (Sankt Piter-Burkh), later Санкт-Петерсбурх (Sankt Petersburkh), and then Санкт-Петербург (Sankt Peterburg). The full name is often substituted by the abbreviation SPb (СПб). "Sankt" was usually confined to writing; people usually called it Петербург (Peterburg) or the common nickname Питер (Piter).