Royal Way is the name of a historical route to the Prague Castle which Czech kings used to take on their way to the coronation. The first monarch to travel this route was Albert II of Germany, in 1438. There is a number of Prague's famous landmarks located along this route - definitely worth visiting, but be prepared for quite a crowd.
Official website http://www.kralovskacesta.cz/en/home.html
More information http://wikitravel.org/en/Royal_Way_of_Prague
Address 33 Celetná, Praha 11000, Czech Republic
Coordinates 50°5'14.007" N 14°25'38.596" E