<P> The dome is one of the largest of its type in the world . Externally , it appears as a large white marquee with twelve 100 m - high yellow support towers , one for each month of the year , or each hour of the clock face , representing the role played by Greenwich Mean Time . In plan view it is circular , 365 m ( one metre for each day in a standard year ) in diameter . It has become one of the United Kingdom 's most recognisable landmarks . It can easily be seen on aerial photographs of London . Its exterior is reminiscent of the Dome of Discovery built for the Festival of Britain in 1951 . </P>
<P> The dome is one of the largest of its type in the world . Externally , it appears as a large white marquee with twelve 100 m - high yellow support towers , one for each month of the year , or each hour of the clock face , representing the role played by Greenwich Mean Time . In plan view it is circular , 365 m ( one metre for each day in a standard year ) in diameter . It has become one of the United Kingdom 's most recognisable landmarks . It can easily be seen on aerial photographs of London . Its exterior is reminiscent of the Dome of Discovery built for the Festival of Britain in 1951 . </P>
what is the diameter of the millennium dome
what is the diameter of the millennium dome
365 m
365 m