"Bagatelle"

 estate (manor / mansion land), LIGC - Long Island Gold Coast

Rumored to have been owned by WK Vanderbilt as a hide-away for his mistress c. 1910. French Manor on 225 acres. Later owned by Dr. Herman Baruch. Now part of the Madonna Heights Crisis Residence for Young Women.
www.bing.com/maps/?v=2&cp=qswyy58wkd5r&lvl=19.274348596...
From NYTimes archives - "In October 1949, Dr. Herman Baruch, the former Ambassador to Portugal (1945) and the Netherlands (1947) and former director of the Texas Gulf Sulphur Company, was married to Anne Maria Baroness MacKay at Bagatelle, Dr. Baruch's country summer home on Burr's Lane in Wyandanch. The bride was the daughter of Dirk Rynhard Johan Baron MacKay of The Hague, the Netherlands. After Dr. Baruch died at home in Wyandanch on March 16, 1953, the Bagatelle estate with its many signature azalea, mountain laurel and rhododendron plantings and its numerous specimen trees, was sold to the Catholic Sisters of the Good Shepherd, which developed it into the Madonna Heights School complex. The Bagatelle Nursery Farm in Dix Hills, was sold and sub-divided into expensive large lot upscale homes about the time the Long Island Expressway reached Half Hollow Hills in the late 1960s. Baroness MacKay Baruch frequently attended church in the Our Lady of Miraculous Medal Church (driven in a chauffered limo) during the summer months when the Baruchs vacationed in Wyandanch."

news.google.com/newspapers?nid=1951&dat=19490824&id=c28...
To the north of the property once ran segments of Long Island Motor Parkway.
www.historicaerials.com/aerials.php?scale=4E-06&lat=40....
halfhollowhills.patch.com/search?keywords=Baruch+%26+Ba...

wikimapia.org/#lat=40.7732619&lon=-73.493042&z=11&l=0&...