Callard & Associates, Ltd. represents manufacturers to professionals in the interior architecture and design trade. If you are a retail shopper interested in learning more about the Merchandise Mart and the many professionals who use the Mart as the premier design resource in the Midwest, we hope you will enjoy some of the following online resources. Merchandise Mart American Society of Interior Designers ASID Working with an Interior Designer ASID Illinois Chapter American Institute of Architects for Consumers