Located in the Roman Catholic Archdiocese of New Orleans, the school was founded in 1962, named after Archbishop James Blenk, and staffed by the Marianites of Holy Cross.

Blenk's school colors were blue and gray and proud home to the doves, their mascot.

One group of concerned parents, students and alumni have created a web site called Stop The Merger to pass along information in the hope of preventing the merger of Archbishop Blenk and Immaculata.

The Times-Picayune reported on January 4, 2007: "Reversing course for the third time in less than a year, the Archdiocese of New Orleans will close the 46-year-old Archbishop Blenk High School in Gretna at the end of the school year and shift its students to Immaculata High in Marrero.

Since the magnet school is public, all religious figures and statues were removed from campus.