If one looks at the modern serveys and measurement from a birds eye and start further mesurment using the Fibonacci sequence. A pattern of undeniable math occurs. At the south east corner you get phi and 5 squered along with the number pie
Probably gave rise to the English nursery rhyme :
Sing a song of sixpence,
A pocket full of rye.
Four and twenty blackbirds,
Baked in a pie.