Bishop Nicholas DiMarzio will preside over the installation of the Msgr. Kieran E. Harrington as the first Rector of the newly named Co-Cathedral of St. Joseph, 856 Pacific St., Prospect Heights, on Sunday, Sept. 15, at 12 p.m. St. Joseph’s was designated as a cathedral on Feb. 14, one of Pope Emeritus Benedict XVI’s last acts before his resignation on Feb. 28.

“I appointed Msgr. Harrington five years ago as administrator of St. Joseph’s,” said Bishop DiMarzio. “During that time, he worked with many different people to make sure the infrastructure of the church was upgraded, but as we all know, a church is not just brick and mortar. A church is about its people. And over the past five years, the parish has become vibrant and grown in no small part to Msgr. Harrington and his collaborators. I am confident under his leadership, the co-cathedral will be at the heart of the development of the new Brooklyn.”

Before St. Joseph’s elevation, St. James Cathedral-Basilica, Downtown Brooklyn, was the only cathedral in the 160-year history of the diocese. St. James Cathedral was previously a pro-cathedral from the moment the diocese was founded; it was conceived that a new cathedral would be built. St. Joseph’s, which can accommodate 1,500 people, is one of the largest churches in the diocese. It is for this reason the bishop sought permission for it to be named a co-cathedral.

Msgr. Kieran E. Harrington, V.E., is vicar for communications for the Diocese of Brooklyn. He also serves as the president and chairman of the DeSales Media Group, a full-service media company that includes NET-TV, a cable television station that can be seen in New York City on Cablevision Ch. 30 and Time Warner Ch. 97, and On Demand on Verizon Fios; The Tablet, the Diocese of Brooklyn’s weekly newspaper with a circulation of 80,000 and 30,000 unique online visitors per month; a technology division overseeing 21 websites; as well as a public relations office serving ecclesiastical needs.

Since 2008, Msgr. Harrington has served as the administrator of the Church of St. Joseph. He graduated cum laude from St. John’s University with a degree in philosophy. He holds a master of divinity degree from the Seminary of the Immaculate Conception and a master of business administration from the N.Y.U. Stern School of Business.

Now-retired Bishop Thomas V. Daily ordained him a priest at St. James Cathedral-Basilica on June 2, 2001. Pope Benedict XVI elevated him to the rank of papal chaplain with the title of reverend monsignor on Sept. 3, 2009.