Joseph Ernest Meyer (September 5, 1878 – 1950) was a prominent citizen, botanist and millionaire from the Northwest Indiana community. He was the founder of the Indiana Botanic Gardens, Bank Calumet and Meyer Publishing. He constructed the Meyer's Castle in today's Dyer as his residence where he lived until his death in 1950. He also constructed a mansion located along the north side of the Little Calumet River in Hammond, Indiana to house the Indiana Botanic Gardens. This mansion housed the Indiana Botanic Gardens until 1990 when the company moved to a newer facility in Hobart, Indiana. The mansion still stands today and is used by Hluska Enterprises Inc. During the summer, it is a retail fireworks outlet and in the fall it is the site of Reaper's Realm Haunted House.