In Frankfurt, the 116m (380feet) University Tower, built in 1972 was demolished on Sunday under the watchful eyes of 30,000 people. 950kg of explosives were used.
In addition a 15-storey Xerox/ACS building in Dallas, Texas has been demolished making way for a new shopping complex.
Despite opposition protests from the local neighbourhood association the demolition went ahead in the early hours of Sunday morning.