Byzantios is the notname of a Romanesque stone sculptor or workshop, working on Gotland in present-day Sweden during the last quarter of the 12th century. Byzantios was the first of a series of Romanesque stone sculpture workshops active on Gotland. Around a dozen decorated baptismal fonts from this time are so similar in style and execution that art historians have assumed they have the same origin. The artist has thus been labelled Byzantios. However, they may also have been made by a workshop and not by a single individual. Likewise, the origins and precise artistic roots of Byzantios are not known, but there is a general agreement on that the art of Byzantios show influences from Byzantine art of the period; hence the notname.