The Cologne Cathedral is the most popular tourist attraction in Germany -- and one of the largest structures of its kind in the world. It took six centuries to build the cathedral -- but it's never really been "finished." Restoration and reconstruction work is constantly underway -- at a number of workshops near the cathedral.
The broadcast times are determined using the time setting of your computer, and refer to the applicable time zone of your region. This is where you change the automatically set time zone. Please note that these are standard UTC time zones, i.e. with no adjustments for summer time.