On Saturday, thousands of Lilly Pulitzer and fascinator-clad fans will descend upon Churchill Downs in Louisville for the 152nd Annual Kentucky Derby . This year, 18 Thoroughbred colts and fillies with names like Renegade, Litmus Test and Chief Wallabee will tear through the starting gates for a chance to be draped in the famous Garland of Roses and earn their piece of an incredibly lucrative prize purse. But how much is that purse, exactly? What might these horses and their owners earn from an appearance in the Winner's Circle, and how has that amount changed over time? We take a look at it all below: Kentucky Derby Purse For the third consecutive year, the purse at the Kentucky Derby will be $5 million. That total amount is then broken down into smaller payouts for the top-five finishers. Finish Prize 1st $3.1 million 2nd $1 million 3rd $500,000 4th $250,000 5th $150,000 How has the Kentucky Derby purse changed over the years?…