Ticinum was an ancient city of Gallia Transpadana, founded on the banks of the river of the same name a little way above its confluence with the Padus.
Gold multiple of Constantine, minted in Ticinum, 313
The Ponte Vecchio (old bridge) in Pavia
Mediolanum, the ancient city where Milan now stands, was originally an Insubrian city, but afterwards became an important Roman city in Northern Italy.
Ticinum
…the Via Aemilia from Ariminum (Rimini) to the Padus (or Po) (187 BC), which it crossed at Placentia (Piacenza) and there forked, one branch going to Mediolanum (Milan) and the other to Ticinum, and thence to Laumellum where it divided once more, one branch going to Vercellae, and thence to Eporedia and Augusta…
Wooden model preserved at the Civic Archaeological Museum of Milan showing a reconstruction of the imperial Mediolanum
A section of Roman wall (11 m high) with a 24-sided tower
Ruins of the Emperor's palace 45°27′54.43″N 09°10′50.15″E / 45.4651194°N 9.1805972°E / 45.4651194; 9.1805972 in Milan. Here Constantine and Licinius issued the Edict of Milan.
Roman solidus coin (picturing Emperor Constantius II) struck at the Mediolanum mint, circa 354-357 A.D.