This Guide Explains How to Solve the Thorm Mausoleum puzzle in Baldur's Gate 3 to Gain Entry to the Gauntlet of Shar.
There are three murals around the northernmost room called: Grief, Moonrise Towers, and General. The names will show when you hover your cursor over each. There are buttons below all three, and you have to press these in a certain order to open the way.
Button the order is:
Moonrise Towers
Grief
General
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