The Green Mystery of Onderdonk Avenue

It seems to be the week of unsolved mystery buildings here at Lost City. Here's a corner structure in Ridgewood Queens, at Onderdonk and Stockholm, whose defining aspect seems to be that it's very, very green. (And, also, rather interesting looking.)

But look closer and you see that that heavy coat of green paint has helped conceal a number of Jewish stars. (And, uh, four-leaf clovers.)

So, what this a religious building in the past? A synagogue, maybe? I can find no evidence of such a past. Right now, there's garment work going on inside. This is the address of PH Knitting Mills and Michael's Sportswear and who knows what else.

The building is right across the street from the towering St. Aloysius Roman Catholic Church.