For those who love hand made lace.
I guess what I was trying to get was an opinion of how old the original lace in this collar might be. Would it be likely to have been made before 1600? I see no edge treatment on the flat buttonholed lace. The cord seems to be something very tightly wrapped. The scrap is not related, but seems to have the same sort of cord attached.
Seeing the back of your collar, deep as it is, suggests it may have been clerical garb. I've seen photos of paintings of a cardinal wearing a long red garment, with a lace alb type garment on top, that went to the hips. That would be a large amount of lace and surface for displaying it. Your piece could be a remnant of something like that. An altar cloth is possible, but I don't know if gros point type laces were ever used for altar cloths.