Albert and Mueller (A&M) are two Luthiers, Franz-Ulrich Albert and Antonius Mueller. In 1984 they began to work together to realize their ideas of combining sound and design with the tradition of craftsmanship in their instruments. In 1989 they established a workshop in an old railway station in Aarbergen Kettenbach, Germany. By that time Agron Llanaj had also joined the A&M Team. A&M make steel string, classical guitars as well as mandolins.