George Gibson Polley (1898–1927) was an American pioneer of (the then-unnamed act of) buildering, or climbing the walls of tall buildings, earning him the nickname "the human fly". According to himself, he began his climbing career at the age of 12 in 1910 when an owner of a clothing store promised him a suit if he would climb to the roof of the building. He succeeded. He had three sons: George, Gibson and Stillman. George Polley died at the age of 29 due to a brain tumor.