Marc T. Nielsen Interiors, based in Valparaiso, Indiana, is a long-established interior design firm specializing in home decor, furniture, antiques, and custom design services. Founded in 1924 by Marc T. Nielsen in Chicago, the company relocated to Valparaiso and has been serving the community for nearly a century. The firm is currently led by Valerie Steil, who took over in 2000 and has expanded its offerings to include detailed design consultations and personalized interior solutions. The company generates revenue through its retail sales of furniture and antiques, as well as through its bespoke interior design services.