passacaglia (n.)

dance tune of Spanish origin, 1650s, from Italian, from Spanish pasacalle, from pasar "to pass" (from Latin passus "step, pace," from PIE root *pete- "to spread") + calle "street," from Latin callis "path, rough track" (which is perhaps related to callum "hard skin;" see callus). So called because the songs often were played in the streets.