Apart from the main temples, there are several other interesting things to see. The gravestones of Abtai Khaan (1554–88) and his grandson Tüshet Khaan Gombodorj (the father of Zanabazar) stand in front of the Dalai Lama Süm and are inscribed in Mongol, Tibetan and Arabic scripts. In the northeast of the monastery are the base stones of a gigantic ger, now called the Square of Happiness and Prosperity , set up in 1639 to commemorate Zanabazar’s birthday. The ger was reported to be 15m high and 45m in diameter, with 35 concertina-style walls, and could seat 300 during the annual assemblies of the local khaans.