Duomo is an interchange station serving Lines 1 and 3 of the Milan Metro.
The station is underground and located at Piazza Duomo, the central area of Milan. The Line 1 station was opened on 1 November 1964 as part of the inaugural section of the Metro, between Sesto Marelli and Lotto. In 1990, it became an interchange with Line 3.
The Line 3 platform serving trains to San Donato has several problems with moisture as it is at a depth of about 25 meters. Line 1, being older, runs above Line 3. The Line 3 section is divided into two orthogonal tubes, the northern one being above the southern one.
Wikipedia https://en.wikipedia.org/wiki/Duomo_(Milan_Metro)
Address 2 Passaggio Duomo, Milano 20123, Italy
Coordinates 45°27'50.899" N 9°11'18.797" E
