Wisteria Mailbox

I was hammering along on my bike at about 18 MPH when I saw this scene flash by out of the corner of my eye.  I immediately stopped and turned around. This is such a lovely creation to see.  Really dresses up the mailbox.  Now, I first titled this "Lilac Mailbox" because that was the first name I thought of when I saw these flowers.  So then I said: "For my gardener friends, please let me know what flowers these are, and I will change the title." You responded, and I have changed the title to "Wisteria Mailbox"  What would I do without friends like you!  Thanks!