Note: this is NOT the old Observatory ("Sterrewacht") located in the center of town
Leiden Observatory is located on the fourth and fifth floor of the Oort and Huygens buildings, which are connected by a glass corridor. The Oort building also houses the Lorentz Center for hosting international workshops on the third floor. For directions to Leiden Observatory follow the directions to the Lorentz Center which can be found here. Maps of Leiden city and the location of the university buildings can be found here.
Visitors coming by car should take notice of the parking regulations. Press the button at the barriers, mention that you are a registered guest, together with your name and the barriers will be opened for you. Please report to the reception upon arrival to obtain a parking permit for the duration of your stay.