After a morning visiting Jokhang Temple in Lhasa (link here), we went to Potala Palace in the afternoon.
Construction of Potala Palace was commenced by the 5th Dalai Lama in 1645 and became the winter residence for the Dalai Lama until 1959. It became a World Heritage site in 1994.
I believe ticket sales are still limited per day. We had paid our guide about a week ahead to secure our place.
Police security is very strict around the palace. We had two checkpoints where we had to show ID, there were quite a few police on foot, the usual high number of cameras and even a large drone observing the crowd at one point.