Foreign Postage Stamps

My uncle was a stamp collector and he gave me some of his stamps when I was a teenager. I knew nothing about stamp collecting back then and I still know nothing about it. I found these in an old envelope and was surprised I still had them. My uncle passed away years ago and he was the only one I knew who collected stamps, so if anyone has any information on these feel free to share. There are a couple American stamps in one of these photos plus I also have around fifty more smaller stamps that I haven't scanned in. Some of these are very interesting and I love the artwork. Have a wonderful day everyone!