Successive Golden Rectangles dividing a Golden Rectangle into squares
(logarithmic spiral known as the golden spiral)
Saint Basil's Cathedral
The Cathedral of Vasily the Blessed, commonly known as Saint Basil's
Cathedral, is a former church in Red
Square in Moscow, Russia. The building,
now a museum, is officially known as the Pokrovsky Cathedral. It was built from 1555–61 on orders from Ivan the Terrible and commemorates the capture of Kazan and Astrakhan. A world famous landmark, it has been the hub of the city's growth since the 14th century.
A golden rectangle
is a rectangle whose side lengths are in the golden ratio,
one-to-phi, that is, approximately 1:1.618. A distinctive
feature of this shape is that when a square section is
removed, the remainder is another golden rectangle, that is,
with the same proportions as the first. Square removal can
be repeated infinitely, which leads to an approximation of
the golden or Fibonacci spiral.