1/4

I have this incredible tree in my front yard that seems to be made of of at least half a dozen trees fused together at the trunk. Base of the trunk is 20-23ft circumference. Neighbors wanted it seriously trimmed or cut down because they believe the family of 5 Cooper’s hawks that live in its canopy are going to attack their 100lb golden retriever. Obviously I told them to keep dreaming and that a 10lb bird doesn’t want to attack their human sized dog. I was wondering if anyone here can tell me what kind of three this is? I know it probably takes a lifetime for them to get this size but Im in love with the look of this tree and want to plant more here in the future. South eastern Pennsylvania.