Leiden is a major center of learning since 1575, and it is home to Leiden University and Leiden University Medical Center. Its rich cultural heritage also has its roots in the arts, and Leiden's favorite sons notably including Rembrandt. MK Illumination was required to transform the entire city center, over 3km of shopping streets. The solution was to link the main streets and alleys with only one theme, one uniting motif in different colors and sizes. These organic balls incorporating the city logo created a veritable roof floating over the streets. Trees illuminated by MK Illumination magically framed an ice rink floating on a canal.