Recreate Wedding Cake

Hello, I am going to recreate this style of wedding cake (see photo) for a friend’s 50 yr anniversary. How would you recommend making the wings on the sides? It should not be a very hot day, no more than 70, likely 60s. The cake will be inside, out of the sun. I have made similar decorations out of white chocolate, but even on a cool day, I feel white chocolate isn’t sturdy enough to use in an object of that size. Would these have likely been made of royal icing? Is there a way to pipe a hard sugar decoration like this? Your help would be greatly appreciated! Thank you.