History
Founded by the Sisters of Mercy in 1956, five sisters were sent from their Brooklyn convent to create and staff a co-educational high school on the East End of Long Island to be named Mercy High School. In the first year of operation, there were 47 students, using excess classrooms of the nearby St. John the Evangelist parish. In October 1962, a new building was dedicated by Bishop Walter Kellenberg of the newly formed Diocese of Rockville Centre which still serves as the present building. In 1992, it was decided that a junior high school was to be added to the already ninth through twelfth grades. In 2002, the Diocese of Rockville Centre and the Sisters of Mercy created a partnership to better enhance the needs of the school. In September 2003, the school's name officially changed to Bishop McGann-Mercy Diocesan High School, after Bishop John McGann, the Diocese's longtime leader, and the Sisters of Mercy signifying the partnership. The school's numbers swelled over the course of the next five years, following a time when some thought the school might close. The Diocese takeover saved the school from debt. Mr. Carl Semmler was the school's principal at that time. However, the school went on to close at the end of the 2018 school year. Deacon John Hogan served as the school's last principal during the 2017–2018 school year. Mr. Charles Bender continued on as the Dean of Students until the school's closure. Lisa Navarra served as the school's Assistant Principal until the school's closure, and was a former teacher at St. John the Baptist Diocesan High School. [1] On March 12, 2018, the Diocese of Rockville Centre announced the school would close at the end of the 2017–2018 school year. [2]
In 2020 The Peconic Bay Medical Center Foundation purchased the 24-acre site of the former McGann-Mercy Diocesan High School from the Diocese of Rockville Centre for $14 million. The Buildings Usage was for the hospital’s ongoing need for additional space during the Corona Virus Pandemic. as the hospital continues to evolve into a regional medical center. [3]
The Diocese of Brooklyn is a Latin Church ecclesiastical territory or diocese of the Catholic Church in the U.S. state of New York. It is headquartered in Brooklyn and its territory encompasses the New York City boroughs of Brooklyn and Queens. The Diocese of Brooklyn is a suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of New York. The diocesan cathedral is the Cathedral Basilica of St. James in Downtown Brooklyn and its co-cathedral is the Co-Cathedral of St. Joseph in Prospect Heights. The current Bishop of Brooklyn is Robert J. Brennan.
The Metropolitan Archdiocese of Philadelphia is a Latin Church ecclesiastical territory, or diocese, of the Catholic Church in southeastern Pennsylvania in the United States.
Kellenberg Memorial High School is a Roman Catholic college-preparatory school in Uniondale, New York, on Long Island, United States. Kellenberg Memorial is a Marianist school on Long Island, alongside St. Martin de Porres Marianist School in Uniondale and Chaminade High School in Mineola, New York.
The Diocese of Manchester is a Latin Church ecclesiastical territory, or diocese, of the Catholic Church for New Hampshire in the United States. It is a suffragan diocese in the ecclesiastical province of the metropolitan Archbishop of Boston.
The Diocese of Rockville Centre is a Latin Church ecclesiastical territory, or diocese, of the Catholic Church in the Long Island region of New York State in the United States. It is a suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of New York.
John Raymond McGann was an American prelate of the Catholic Church. He served as bishop of the Diocese of Rockville Centre, in New York from 1976 to 2000. He previously served as an auxiliary bishop of the same diocese from 1970 to 1976.
James Thomas McHugh was an American prelate of the Catholic Church who served as bishop of Diocese of Rockville Centre in New York during the year 2000.
William Francis Murphy is an American prelate of the Roman Catholic Church. He served as bishop of the Diocese of Rockville Centre on Long Island, New York, from 2001 to 2016 and as an auxiliary bishop of the Archdiocese of Boston in Massachusetts from 1995 to 2001.
St. Anthony's High School is a Roman Catholic college preparatory school located in South Huntington, New York on Long Island. The school was founded in 1933 by the Franciscan Brothers of Brooklyn.
The Diocese of Columbus is a Latin Church ecclesiastical territory, or diocese, of the Catholic Church covering 23 counties in central Ohio in the United States. It is a suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of Cincinnati.
The Diocese of Camden s is a Latin Church diocese of the Catholic Church in the U.S. state of New Jersey. It consists of 62 parishes and about 475,000 Catholics in the South Jersey counties of Atlantic, Camden, Cape May, Cumberland, Gloucester, and Salem.
The Diocese of Allentown is a Latin Church ecclesiastical jurisdiction, or diocese, of the Catholic Church in the Lehigh Valley region of Pennsylvania in the United States. It is a suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of Philadelphia.
Holy Trinity High School is a co-educational learning environment located centrally in Hicksville, Nassau County, New York on Long Island. Education is based on New York State Education Standards with a strong emphasis on Religious Studies. It is operated by the Roman Catholic Diocese of Rockville Centre.
Lebanon Catholic School was a private, Roman Catholic high school in Lebanon, Pennsylvania, United States. It was located in the Roman Catholic Diocese of Harrisburg. It closed in 2020.
Cathedral Preparatory School and Seminary is a Roman Catholic high school and seminary in Elmhurst, Queens in New York City. It is operated by the Diocese of Brooklyn. It is the last full-time high school seminary day school in operation in the United States.
Emil Aloysius Wcela was an American prelate of the Roman Catholic Church. Wcela served as an auxiliary bishop of the Diocese of Rockville Centre in New York State from 1988 to 2007.
Richard Garth Henning is an American prelate of the Catholic Church who became bishop of the Diocese of Providence in Rhode Island in 2023.
William Edward Koenig is an American prelate of the Roman Catholic Church who has been serving as the tenth bishop of the Diocese of Wilmington in Delaware since 2021.
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