All directions to Paris and Meudon Observatory are described in detail here . In the following page we provide additional details to find the “Salle de réunion du Château” (Meeting room of the castle) in Meudon Observatory.
The pedestrian entrance of of Meudon Observatory is 7 place Jules Janssen, Meudon, From Meudon train station, you will have a uphill walk. There is a guard at the entrance. The best thing is to show your badge at the gate. But to be sure, do not forget your ID. See below the entrance of Meudon Observatory. Enter this gate (always open) and turn right. You will see another gate.
Enter this gate, turn right, see the guard gate. Then follow a pedestrian path on the left that goes through a staircase to access the upper level (path in red below).
