In the 1880s, plans for a new traffic routing were developed when it was decided to build a northeastern extension of the Unter den Linden boulevard through the Palace's Lustgarten. In 1884 the German Emperor William I gave his consent to replace the pedestrian bridge with a much larger, richly ornamented stone construction. Beyond the river, after lengthy negotiations with numerous property owners, the three historic alleys were combined to a broad street, built according to plans designed by August Orth, to complete the interconnection from Unter den Linden to the New Market square.