Somdej Phra Buddhacarya (To Brahmarangsi) (original name: To) or popularly called "Somdej To", "Luang Pu To" or "Somdej Wat Rakhang" is a monk of Maha Nikaya. It is an important monk who is very popular and respected in Thailand. He previously held the position of abbot of Wat Rakhang Kositaram Woramahaviharn during the reigns of King Rama 4-5.

Somdet Phra Buddhacarya (To Brahmaṃsi) is considered to be a guru monk who has admirable conduct. He has been universally respected since he was alive. From the king to the common people[1] and besides his outstanding ethics of austerity He is also skilled in magic spells and kindness, especially the sacred object "Phra Somdej" that he created to worship Buddha. Has been arranged into the Benjapakee amulets. Or the best of the sacred amulets, 1 of 5 in Thailand [2] and has a current trading price per amulet for millions of baht [3] with his virtuous conduct and amazing magical qualities. causing Thai Buddhists to respect him as one of Thailand's immortal senior monks and there are many believers today