Access after hours
The access between the Palais and the Concorde will be locked at 2230 each night. If you are at the Palais and need to get to the Concorde, you will need to exit the Palais through the middle entrance on Level 0 and walk outside to the hotel entrance.
To enter the Palais during the hours of 2230 and 0700 you need to enter through the doors on Boulevard Gouvion St Cyr closest to Place de la Porte Maillot. Take the A escalators (Neuilly side) up to Level 2.