What is William Henry Harrison best known for?

William Henry Harrison is famous for being the shortest-serving president in American history. He'd been in office for just thirty-one days before he succumbed to what is thought to have been typhoid fever. It's widely believed by historians that Harrison contracted his fatal illness on the day of his inauguration, when he turned out on that cold, wet March day without an overcoat or hat.
Aside from Harrison's death being a tragedy for his family, it was tragic for the country as a whole, as Americans never got to see their new president make his mark in office. Harrison had distinguished himself as a soldier, serving his country well during the War of 1812. There is every reason to expect that he would've shown the same positive qualities during his presidency. The sad fact is that we will never know.