Friends of Star of the Sea’s long-closed Quincy parish are calling on Attorney General Maura Healey to investigate its closing, according to a letter issued yesterday to the archbishop of Boston.

“We have argued that while the cardinal is within his right to suppress parishes, we believe we were a valuable and vibrant parish,” said Maureen Mazrimas, co-chairwoman of Friends of Star of the Sea. “It’s only because of our size that we were suppressed.”

The group asks the AG to look at whether the archdiocese has lived up to its fiduciary responsibility to safeguard property donated by the parishioners.

Mazrimas said at the time it was closed, the church had around 400 worshipers and one priest. She said real estate money from the closure “should have followed the parishioners, but instead it went to the general coffers.”

Over the years, Friends of Star of the Sea have appealed to various courts of the Vatican against the decision to suppress the parish.

Mazrimas criticized the decision process, saying parishes gathered and “essentially decided who they were going to vote off the island” based on the size of the congregation.

The Archdiocese had no immediate comment.