How many witnesses are there who physically saw and/or touched the golden plates from which the Book of Mormon was reportedly translated?

I understand the Book of Mormon has a list of witnesses. However, I have heard that these witnesses may not have actually ever seen the gold plates that contained the original manuscripts for the Book of Mormon, but were witnesses in a different sort of way. So, just how many people physically saw and/or touched the gold plates from which Joseph Smith is said to have translated the Book of Mormon? *Note: Martin Harris, one of the witnesses, later explicitly denied seeing the plates with his physical eyes. See article. .*