Bhikkhu in the context of "Stupa"

Buddhist monasticism is one of the earliest surviving forms of organized monasticism and one of the fundamental institutions of Buddhism. Monks and nuns, called bhikkhu (Pali, Skt. bhikshu) and bhikkhuni (Skt. bhikshuni), are responsible for the preservation and dissemination of the Buddha's teaching and the guidance of Buddhist lay people. Three surviving traditions of monastic discipline (Vinaya), govern modern monastic life in different regional traditions: Theravada (Sri Lanka and Southeast Asia), Dharmaguptaka (East Asia), and Mulasarvastivada (Tibet and the Himalayan region).

Vihāra generally refers to a Buddhist temple or Buddhist monastery for Buddhist renunciates, mostly in the Indian subcontinent. The concept is ancient and in early Pali texts, it meant any arrangement of space or facilities for dwellings. The term evolved into an architectural concept wherein it refers to living quarters for monks with an open shared space or courtyard, particularly in Buddhism. The term is also found in Jain monastic literature, usually referring to temporary refuge for wandering monks or nuns during the annual Indian monsoons. In modern Jainism, the monks continue to wander from town to town except during the rainy season (chaturmasya), and the term "vihara" refers to their wanderings.

Vihara or vihara hall has a more specific meaning in the architecture of India, especially ancient Indian rock-cut architecture. Here it means a central hall, with small cells connected to it, sometimes with beds carved from the stone. Some have a shrine cell set back at the centre of the back wall, containing a stupa in early examples, or a Buddha statue later. Typical large sites such as the Ajanta Caves, Aurangabad Caves, Karli Caves, and Kanheri Caves contain several viharas. Some included a chaitya or worship hall nearby. The vihara originated as a shelter for monks when it rains.

A nun is a woman who vows to dedicate her life to religious service and contemplation, typically living under vows of poverty, chastity, and obedience in the enclosure of a monastery or convent. The term is often used interchangeably with religious sisters who do take simple vows but live an active vocation of prayer and charitable work in the wider society.

In Christianity, nuns are found in the Catholic, Oriental Orthodox, Eastern Orthodox, Lutheran, and Anglican and some Presbyterian traditions, as well as other Christian denominations. In the Buddhist tradition, female monastics are known as Bhikkhuni, and take several additional vows compared to male monastics (bhikkhus). Nuns are most common in Mahayana Buddhism, but have more recently become more prevalent in other traditions.

Empress Kōken (born Abe, known as Empress Shōtoku during her second reign; 718–770) was the 46th and 48th monarch of Japan according to the traditional order of succession. She was born to Crown Prince Obito (the future Emperor Shōmu) and his consort Fujiwara Asukabehime; seeking to protect the bloodline of Prince Kusakabe, her father proclaimed her the first crown princess in Japanese history in 738. She became the Empress Regnant in 749, after her father retired to become a Buddhist monk. With the backing of her mother (now Dowager Empress Kōmyō) and her mother's nephew Fujiwara no Nakamaro, she was able to outmaneuver a largely hostile Daijō-kan (Council of State). Her father died in 756, having named a cousin unrelated to the Fujiwara as her heir; this outraged Fujiwara supporters, and Kōken replaced him with Prince Ōi, a close ally of her mother and Nakamaro. In 757, she headed off a conspiracy to overthrow her by Tachibana no Naramaro, and resigned the following year to serve as empress emerita (Daijō Tennō), while Ōi reigned as Emperor Junnin.

Nakamaro slowly consolidated his political power with the backing of dowager empress Kōmyō. After an illness, Kōken became close to a healer-monk named Dōkyō, who became one of her strongest allies, as well as potentially an intimate partner. After this, she became a bhikkhunī (Buddhist nun) and shaved her head. After her mother's death in 760, Kōken began to oppose Nakamaro. She proclaimed superiority over Emperor Junnin in state matters in 762, and allied with anti-Nakamaro leaders, including her childhood tutor Kibi no Makibi. In 764, political conflict grew violent after she attempted to take control of the royal seals; Nakamaro fought a brief rebellion against her, naming Prince Shioyaki as emperor, but both were captured and executed, and Kōken returned to the throne as Empress Shōtoku.

Saichō (最澄; Japanese pronunciation: [saꜜi.tɕoː], September 15, 767 – June 26, 822) was a Japanese Buddhist monk credited with founding the Japanese Tendai school of Buddhism. He was awarded the posthumous title of Dengyō Daishi (伝教大師).

Recognized for his significant contributions to the development of Japanese Buddhism, Saichō is most famous for introducing the Chinese Tiantai school to Japan, which he adapted into the Tendai tradition. Saichō traveled to Tang China in 804, where he studied the Chinese Tiantai school (along with other traditions). After returning to Japan, he founded the temple and headquarters of Tendai at Enryaku-ji on Mount Hiei (near the capital of Kyoto), which became the center of Tendai practice and a major institution in the history of Japanese Buddhism.

Srivijaya (Indonesian: Sriwijaya), also spelled Sri Vijaya or Sriwijaya, was a Malay thalassocratic empire based on the island of Sumatra (in modern-day Indonesia) that influenced much of Southeast Asia. Srivijaya was an important centre for the expansion of Buddhism from the 7th to 11th century AD. Srivijaya was the first polity to dominate much of western Maritime Southeast Asia. Due to its location, Srivijaya developed complex technology using maritime resources. In addition, its economy became progressively reliant on the booming trade in the region, thus transforming it into a prestige goods-based economy.

The earliest reference to it dates from the 7th century. A Tang dynasty Chinese monk, Yijing, wrote that he visited Srivijaya in 671 for six months. The earliest known inscription in which the name Srivijaya appears also dates from the 7th century in the Kedukan Bukit inscription found near Palembang, Sumatra, dated 16 June 682. Between the late 7th and early 11th century, Srivijaya rose to become a hegemon in Southeast Asia. It was involved in close interactions, often rivalries, with the neighbouring Mataram Kingdom, Khmer Empire and Champa. Srivijaya's main foreign interest was nurturing lucrative trade agreements with China which lasted from the Tang to the Song dynasty. Srivijaya had religious, cultural and trade links with the Buddhist Pala of Bengal, as well as with the Islamic Caliphate in the Middle East.

Sannyasa (Sanskrit: संन्यास, romanized: saṃnyāsa), sometimes spelled sanyasa, is the fourth stage within the Hindu system of four life stages known as ashramas, the first three being brahmacharya (celibate student), grihastha (householder) and vanaprastha (forest dweller, retired). Sannyasa is traditionally conceptualized for men or women in the last years of their life, but young brahmacharis have the choice to skip the householder and retirement stages, renounce worldly and materialistic pursuits and dedicate their lives to spiritual pursuits.

Sannyasa, a form of asceticism marked by renunciation of material desires and prejudices, is characterized by a state of uninterest in and detachment from material life, with the purpose of spending one's life in peaceful, spiritual pursuits. An individual in Sanyasa is known as a sannyasi (male) or sannyasini (female) in Hinduism. Sannyasa shares similarities with the Sadhu and Sadhvi traditions of Jain monasticism, and the sannyasi and sannyasini share similarity with the bhikkhus and bhikkhunis of Buddhism.

Saṅgha or saṃgha (IPA: [sɐŋɡʱɐ]) is a term meaning "association", "assembly", "company" or "community". In a political context, it was historically used to denote a governing assembly in a republic or a kingdom, and for a long time, it has been used by religious associations, including Buddhists, Jains and Sikhs. Given this history, some Buddhists have stated that the tradition of the sangha represents humanity's oldest surviving democratic institution.

In Buddhism, sangha refers to the monastic communities of bhikkhu (monks) and bhikkhuni (nuns). These communities are traditionally referred to as the bhikkhu-sangha or the bhikkhuni-sangha. As a separate category, those Buddhists who have attained any of the four stages of enlightenment, whether or not they are members of the monastic community, are referred to as the āryasaṅgha ("noble Sangha").