Professor Hans Hertlein, German architect and university professor, head of construction at the Siemens Group, was the architect who built the Kiel Pain Clinic building between 1937 and 1938. Among other things, Professor Hertlein was an honorary member of the Academy of Arts in Berlin and was awarded the Grand Cross of Merit of the Federal Republic of Germany in 1957. One of Professor Hans Hertlein's defining architectural features is a projecting stairwell tower equipped with a large clockwork. The Wernerwerk high-rise building he built in Berlin Siemensstadt and the so-called Raspberry Palace, an office building for Siemens AG in Erlangen, have received corresponding equipment. The Kiel Pain Clinic building also has two clocks in its western stairwell tower. Just in time for the changeover from summer time to winter time, these were now equipped with a receiver for the signals from the DCF77 time signal transmitter for the first time. This transmitter supplies most radio-controlled clocks in most of Europe with the legally applicable standard time. The designation DCF77 is derived from D for Germany, C for long-wave transmitter, F for the proximity to Frankfurt and the number 77 for the carrier frequency 77.5 kHz. The Federal Physical and Technical Institute sends the data signal for date and time via DCF77. The transmitter's control device is synchronized with the primary atomic clocks of the Federal Physical and Technical Institute in Braunschweig. The time signal has an accuracy with a maximum relative standard deviation of 10-12, corresponding to an error of 1 second in 30,000 years. The tower clocks of the listed building of the Kiel Pain Clinic now show the most accurate possible time.