The Piazza is a vibrant online community founded on May 22, 2008, by Ashtagon, emerging as a response to the removal of specific subforums from the Gleemax forums that catered to out-of-print Dungeons & Dragons campaign settings. Initially a haven for fans of classic D&D editions, The Piazza has blossomed into a comprehensive resource for enthusiasts of various tabletop RPG settings, including titles like Council of Wyrms, Jakandor, and Ghostwalk, among others. Emphasizing inclusivity, The Piazza welcomes both old school and new school fans, fostering an environment where crossovers between different systems and campaign settings thrive without judgment.

In addition to its lively forums, The Piazza offers a product information website, known as The Book-House, where users can access RPG product details, reviews, and related content. With an active presence on social media platforms like Facebook and Twitter and a dedicated Discord server, The Piazza supports numerous projects, including homebrew settings, rules conversions, and collaborative fanzines, ensuring a rich experience for every tabletop RPG enthusiast.