Mürzzuschlag, town, east-central Austria, at the junction of the Fröschnitz and Mürz rivers, northeast of Bruck an der Mur. First mentioned in 1227, it was chartered in 1318 and has been an ironworking centre since the 14th century. It has medieval houses and a former Cistercian abbey with a church from 1496 and beautiful cloisters. An Alpine summer and winter resort of the Semmering region, Mürzzuschlag is a noted skiing centre. The town also serves as a market and service centre for the largely rural environs. Pop. (2006) 9,246.