Looking at some people's comments, I almost thought it wasn't the church I saw. In fact, it's not very noticeable in the church on Fifth Avenue. It's square and plain. And not much. It is located at the junction of 53rd Street and Fifth Avenue.
St. & Thomas Church still has a place in New York churches. Unlike other churches, it's Episcopal Church. We came on Sunday when the church was open and we could visit it. The interior of the church is very beautiful. You can take a look at it when you visit Fifth Avenue.