The Tenggerese also worship ancestor spirits, which they call “roh.” This is a common term for such spirits in Java, and is also part of Islamic Javanese culture.Belief in ancestor spirits (roh) is an example of the persistence of adat in this era, when most of Indonesia is nominally Muslim.Among the Tenggerese, during rituals, they may feed small images representing rohs. The figures are dressed up in fine traditional cloth. On other occasions, such offerings may be made for spirits of the land (hence, evidence of animism).They also offer worship to local evil spirits to keep them satisfied, so they will not be harmful.Of course, Mount Bromo is the natural deity that is perhaps most important, and so it is also worshiped. If this volcano erupts, then locals believe that the god must be angry.The biggest ritual festival of the Tenggerese is known as the Yadnya Kasada. Yadnya is the Javanese version of the Sankskrit word “yajña” (meaning fire ceremony in the month of Kasada).On this occasion, Tenggerese people go to the mountain and ask for the blessings of the highest deity in the cosmos, locally known as Hyang Widi Wasa, and also from Mahadeva (= Shiva), the god of the mountain itself.In modern times, the locals have built a Balinese-style temple inside part of the crater on top of the volcano-mountain.During the Kasada festival, they bring offerings, such as rice, fruit, and animals.When visiting the mountain for this festival, I witnessed locals throwing such offerings down into the center of the volcano.