This block belongs to a popular quilt: Dear Jane. It’s block C09.
How to do reverse appliqué with freezer paper
Susan’s Dear Jane templates are free though she says “I only ask that you consider making a donation to the Bennington Museum, in Bennington, Vermont. And if you do, it would make me tremendously happy if you would tell them that you have received help from me.” I totally recommend Susan’s patterns as they are very professional and easy to use.