 In the past, the Baikal was referred to by many Russians as the "Baikal Sea" (, "More Baikal"), rather than merely "Lake Baikal" (, "Ozero Baikal").This usage is attested already in the "Life" of Protopope Avvakum (1621–1682), and on the late-17th-century maps by Semyon Remezov.It is also attested in the famous song, now passed into the tradition, that opens with the words "Славное море, священный Байкал" (Glorious sea, [the] sacred Bajkal).