From Fontán, Fierro street, where the church of St. Isidore is located, leads to Constitución square, a broad space dominated by the colonnades of the town hall whose central arch coincides with the old access gate to the walled city. The Torre del Reloj (Clock Tower) is one of the references of this building endowed with good proportions, dated as being from the 17th century, serving as a time tunnel to leap, once again, from the Baroque to the Middle Ages, in an environment which draws us a little closer to that of the historic Jewish quarter of Oviedo.