Here's a small section of the floor.
This is the altar, with some organ pipes above and to one side, along with a modern light fixture support.
In one corner of the church is this statue of San Bartolomeo (St. Bartholemew), who is believed to have been skinned alive. More on the Duomo may be found at Sacred Destinations, Wonder Mondo, A View On Cities and Milano 24.
After leaving the Duomo, I ran across Thomas the Tank Engine in the adjacent square, and took a pic.
I later wandered down Via Dante, which led toward the Castello Sforzesco, in front of which is a statue of Giuseppe Garibaldi, who led the campaign to unite modern Italy, known as the Risorgimento.
I eventually encountered some shady characters, but made it back to the Piazza del Duomo, to get a shot of the Duomo's facade, and of course, the crowd.
That's all for Milan. For the rest of the trip, it was back to the lakes.