A bicorne hat worn by Napoleon Bonaparte was sold at auction for $2.1 million, one of a few remaining hats that Napoleon wore when he ruled France and fought wars in Europe. It was initially estimated to sell for between $650,000-$870,000 but bidding quickly exceeded expectations. Napoleon wore his hats with the ends of the brim pointing towards his shoulders in a style called "en bataille," which made it easier for troops to spot him in battle compared to other officers who wore their hats with the brim facing front to back.