sentences:  This work ceased in 1473, leaving the south tower complete to the belfry level and crowned with a huge crane that remained in place as a landmark of the Cologne skyline for 400 years.Some work proceeded intermittently on the structure of the nave between the west front and the eastern arm, but during the 16th century this also stopped.With the 19th century romantic enthusiasm for the Middle Ages, and spurred by the discovery of the original plan for the façade, it was decided, with the commitment of the Protestant Prussian Court, to complete the cathedral.