Arhitecture and Christams decorations (2022) at the centre of town were fabulous, better than in UK, Germany, never seen anything like this.
Remember: all shops are closed during Christmas, if you are in hired apartment - there is nowhere to get food from; you can eat only in some Asian caffes somewhere at the outskirts of town. All restaurants, except 2 or 3 in the centre of town, are closed. Huge queues. There is not much to eat at Christmas food market.
Dont visit Milan during Christmas Eve & Boxing day otherwise you will starve. At least you pay for all inclusive hotel if such hotel exists in Milan and eat there. Or come before Chritmas Eve & Boxing day and stack yourself with food.
Be aware of problems at the late night time. Metro worked only until 22.00 and we had to walk home 1.5 hours. Police warned us to keep away from representatives of some nationalities which walk in groups of three. Not safe in very late time. Besides this experience was brilliant.