Escape the infinite roomPOTENTIALLY MISSABLE
The Infinite Corridor is an optional room located at the beginning of the Mausoleum. To get to it, as soon as you solve the Key Dial puzzle and enter the door that connects the Main Hall to the Mausoleum, go down the two sets of stairs and, instead of going straight through the door, turn right at the first at the first intersection. You will hear a Slider approaching and, behind it, you will see a series of warning signs, indicating that you have arrived at the right place.
Once inside the room, you must solve the short puzzle by entering the 7 doors in a specific order: Golden door, Empty basin door, North door, Wooden door, Earth basin door, Ember basin door and West ("Oeste") door. If you did well, a candle will light for each successful attempt, otherwise all will all go out and you will have to start over. As soon as you leave the room, you will get the trophy and you will be able to access Bertram's Office, where you can find the Antidote necessary for the Sisters trophy.
If you prefer a visual guide on how to escape from the infinite corridor, you can watch the following video: