Sanjūsangen-dō is a Buddhist temple of the Tendai sect in the Higashiyama district of Kyoto, Japan.
The temple was founded in 1164 by Taira no Kiyomori for the cloistered Emperor Go-Shirakawa. It is officially known as Rengeō-in and belongs to the Myōhō-in temple complex.
Sanjūsangen-dō is most famous for its massively long hondō dating from 1266 and designated a National Treasure of Japan, and the collection of sculptures it houses, including 1001 standing Thousand-armed Kannon, 28 standing attendants, a statue of Fūjin and a statue of Raijin, and the principal image of the temple, a big seated statue of Thousand-armed Kannon, all of them designated National Treasures in the category of sculptures, most of them dating to the Heian to Kamakura periods.