What is hamilton coolidge?

As an AI language model, I cannot be sure which Hamilton Coolidge you are referring to. However, there are two famous persons with the name Hamilton Coolidge.

1. Hamilton Coolidge (1885-1918) was an American pilot who died in World War I. He was born in Boston, Massachusetts, and was a descendant of President Calvin Coolidge. Hamilton was a pilot in the US Army Air Service during WWI and was killed in action in France on August 9, 1918.

2. Hamilton Coolidge (1915-2008) was an American architect, author, and educator. He was born in Boston and graduated from Harvard University and the Harvard Graduate School of Design. He worked as an architect in Boston for more than 50 years and authored several books on architecture. He was also a professor at the Massachusetts Institute of Technology's School of Architecture and Planning. Hamilton Coolidge died on December 28, 2008, at the age of 93.