Picture Stone (500-550 AD), with a large whorl in the center. It depicts the sun circling in the sky. Below, two horses face each other; from Havor, Hablingbo, Gotland Island, Sweden.
The whirlwheel is the most common motif on the oldest picture stones. The famous picture stones of Gotland are like Viking rune stones from Scandinavia, but they have more pictures and fewer runes.