Bussokuseki, the footprints of Gautama Buddha. This is actually a modern reproduction of the oldest Bussokuseki in Japan, located at Yakushiji temple (Been there!) in Nara. You can see the Dharmachakra in the center, and some of the Sanjuunisou, 32 auspicious signs of the Buddha. Here's a chart and explanation of the markings:
Man-Hanamon-sō 卍花文相. Lit. "Decorative Version of 卍 Symbol." 卍 is also known as Kyōji 胸字 in Japan.
Getsu-ō-sō 月王相. Lit. "Mark of Moon King." Getsu-ō is the translation of Śaśāṇka, the Moon King, the ruler of an Indian kingdom known as Karṇasuvarṇa.
Kongōsho-sō 金剛杵相. Lit. "Mark of Vajra Pestle," the indestructible mallet.
Sōgyo-sō 双魚相. Sometimes also called Sōgyohō-sō 双魚宝相. "Mark of Double Fish." A Pair of Fish Facing Each Other.
Hōbyō-sō 宝瓶相. Lit. "Mark of the Jeweled Vessel, the Precious Vase."
Senbukurin-sō 千輻輪相. Lit. "Mark of the Thousand-spoked wheel."
Bon-ō-chō-sō 梵王頂相. Lit. "Cupula of the King of the Brahma Heaven."