Queen of Peace Cemetery

The land was purchased by the diocese in 1995 at auction from the federal government following seizure from a former owner; however, the Village of Old Westbury delayed construction for over two decades by litigation, which was settled in 2016.

[6] By this time the estate encompassed 97 acres,[4] and contained a race track, steeplechase course, polo field, and other facilities.

At the time, the property contained a 42-room 14,000 sq ft (1,300 m2) mansion that was in a dilapidated state, a barn complex with 49 horse stalls, a five-door garage and a three-bedroom guest cottage.

[11] However, the cemetery's opening was delayed for over two decades by legal disputes with the Village of Old Westbury, which denied the necessary zoning change in 1995.

The diocese sued the village in state court to compel the zoning change under religious land use protections, and received a favorable ruling in 2000 that was upheld on appeal in 2002.

The diocese sued in federal court in 2009, alleging that the village was abusing its powers to delay and prevent the cemetery's development.

[10] However, the plan was criticized by the Society for the Preservation of Long Island Antiquities for not retaining the historic structures and altering the site's rural setting.

It contains 32 Munich-style stained glass windows that were transferred from Sisters of Christian Charity's convent in Mendham Township, New Jersey, as they were not being used in its own new chapel.