Hands feel the coldness of the stone as they graze the front elevation of the Cathedral. Restored at the end of the 15th century, it houses the protruding body of the tetra-style portico, made by the magister Ambrosius da Como. It is subdivided into three large arches, two lateral pointed arches and a central full-centre one, supported by four columns. The dynamism of the ribbed cross vaults permeating the roof of the portico is reminiscent of the decorations on the ancient gate. Dating back to the second half of the 12th century, the gate is still a fine example of architecture today, although time has compromised the sculptural work by master stone carvers from the Romanesque period.