The Met­ro­pol­i­tan Cathe­­dral-Basil­i­­ca of the Nativ­i­ty of Saint Mary is one of the most mag­nif­i­cent build­ings in Milan. It took almost six cen­turies for the cathe­dral to be com­plet­ed. Con­struc­tion start­ed in 1386 and would not be fin­ished until 1965. Its mas­sive size makes Milan Cathe­dral one of the largest Chris­t­ian church­es in the world.