Complex sentence: In the 1963-64, he designed a museum based on a revolutionary idea: construct a museum around a continuous ramp that started at one corner of the ground floor and snaked around the building on its way to the top.
Split into simpler sentences: In the 1963-64, he designed a museum based on a revolutionary idea. The idea was to construct a museum around a continuous ramp that started at one corner of the ground floor and rose gradually around the building on its way to the top.