I found the interior of the Duomo to be definitely more interesting than the exterior. The dome is especially stunning. Beautifully illuminated by the clearstory windows and highlighted in gold leaf, it alone is worth the visit. Very Gothic in feeling, most interior is relatively dark except for the shaft of light created by the dome.
The most important church in Como is the Cathedral of St. Mary of the Assumption known simply as the Duomo. We had been sort of casually looking for it while walking through the winding streets pass the many shops and cafes located in the area inside the old walled city. When we saw it we weren't really sure we had arrived. The structure is a little confusing. The main facade is Gothic with several ornately sculpted pilasters and niches. The middle section called the Broletto is styled quite differently and built from two different colored stones - pink and gray.
The bell and clock tower on the left is yet different again built in rough hewn stone.
I preferred the view from the rear which shows the dome structure.