Sister Margaret's School for Wayward Children

 is a fictional mercenary dispatch center featured in comic books published by Marvel Comics. It is associated with the Deadpool line of titles and first appeared in Deadpool, Volume 2 #1 in January, 1997.

History
Colloquially known as "Hellhouse", this was building served as a private school in Chicago in the 1950s. Corruption among the staff however, forced it to shut down. For years, the building lied empty and condemned. Decades later, the so-called "Hellhouse" re-opened, but not as a school for wayward children. It operated as an underground dispatch center for mercenaries and assassins. It was run by a contract broker named Patch, and many of its regular clients included Deadpool, T-Ray, Fenway, and Steele Fitzpatrick.

Characters associated with

 * Deadpool, Wade Wilson
 * Fenway, Homer Un
 * Patch, Bob Stirrat
 * T-Ray