Can you help me find paintings or artwork containing regular polygons?

My math project requires me to find pieces of art that contain 5 regular polygons, one in each would help and should be different from each other (eg- square,octagon,heptagon,hexagon,pentagon etc.) and then find their interior and exterior angles and whether they are concave and convex alongwith no. of sides, no. of int/ext. angles and their sums. Can you suggest websites with such artwork and help me distinguish between convex/concave and how to find the measures of its angles?