Unter den Linden runs east–west from the site of the former Stadtschloss royal palace at the Lustgarten park, where the demolished Palast der Republik used to be, to Pariser Platz and Brandenburg Gate. Eastward the boulevard crosses the river Spree near the Dom (Berlin Cathedral) and continues as Karl-Liebknecht-Straße. The western continuation behind Brandenburg Gate is Straße des 17. Juni. Major north–south streets crossing Unter den Linden are Friedrichstraße and Wilhelmstrasse. 