Leipzig is the most populous city in the federal state of Saxony. Leipzig has been a trade city since at least the time of the Holy Roman Empire. The city sits at the intersection of the Via Regia and the Via Imperii, two important medieval trade routes. Leipzig was once one of the major European centers of learning and culture in fields such as music and publishing. Leipzig has long been a major center for music, both classical as well as modern "dark alternative music" or darkwave genres. The name Leipzig is derived from the Slavic word Lipsk, which means "settlement where the linden trees stand".