Bern's city centre is largely medieval and has been recognised
by UNESCO as a Cultural World Heritage Site. Perhaps its most famous sight
is the Zytglogge (Bernese German for "Time Bell"), an elaborate medieval clock
tower with moving puppets. Our hero Albert Einstein, whilst living at
Kramgasse No. 49, developed the Special Theory of Relativity. His work on
the General Theory also began in Bern. In June 1902, Einstein started work
as a "technical expert third class" at the Patent Office in Bern. In 1908
he lectured at Bern University and in 1909 he resigned from the Patent Office in
order to take up the post of associate professor of theoretical physics at
Zurich University.
