Buddhist calligraphy and epigraphy.
Mantra, Dhāraṇī, Sūtra. Languages: Sanskrit, Pāli, Tibetan. Scripts: Siddhaṃ aka Bonji (梵字), Tibetan (dbu-can/Uchen), Ranjana/Lantsa, Devanāgarī.
This is the mantra of Avalokiteśvara.** oṃ maṇipadme hūṃ ||The script is called Wartu and is an adaptation of Lantsa - a headless form - from Tibet. I don't know this script, but have based this on some calligraphy by Tashi Mannox.