Mondial House, Telecommunications building near Cannon Street Station, London, United Kingdom.
The structure featured a stark geometric exterior design with twelve floors and stood prominently along the banks of the River Thames.
Completed in 1978 with a construction cost of 18 million pounds, Mondial House operated as the largest telephone exchange center in Europe.
The structure represented the shift in London's architectural preferences during the 1970s, reflecting similar design elements to the Royal National Theatre.
The building connected 23 million calls annually through 20,000 international lines, managing up to 200,000 calls per hour at maximum capacity.
Built on the former churchyard of All-Hallows-the-Great, the building's telecommunications equipment alone cost 11 million pounds to install.
Inception: 1978
Floors above the ground: 12
GPS coordinates: 51.51000,-0.09000
Latest update: March 6, 2025 05:01
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