The question underlying this investigation is whether Gotland's Viking-Age Picture stones were the subject of workshops and schools. One way of approaching this is to examine whether the use of templates and cutting techniques might show interrelationships between craftsmen and on this basis discuss different craft traditions. This study will thus examine if and how templates or stencils were used on Gotland's Viking-Age picture stones and what cutting techniques were applied when reproducing the sails on the picture-stone ships.