Lincoln's Hat

Lincoln's hat is a headwear item that can be found in the Museum of History.

Location
From the Museum of History Lower Halls, enter the Offices. Continue forward and head up the stairs. At the end of the stairway, turn right head down the hallway and enter the first room on the right. It will be filled with rubble; the hat is slightly to the left, by a large desk. The hat is lying at the floor about 2–3 meters from the room entrance on the left - quite easy to miss in the darkness, so put on your Pip-Boy light. If you can't find the room it is the northwestern room on the local map.

You can either fall down to the room from above when you go upstairs or get there directly from the offices.