Buddhism may have spread only slowly in India until the time of the Mauryan emperor Ashoka, who was a public supporter of the religion. The support of Aśoka and his descendants led to the construction of more stūpas (Buddhist religious memorials) and to efforts to spread Buddhism throughout the enlarged Maurya empire and even into neighboring lands—particularly to the Iranian-speaking regions of Afghanistan and Central Asia, beyond the Mauryas' northwest border, and to the island of Sri Lanka south of India. These two missions, in opposite directions, would ultimately lead, in the first case to the spread of Buddhism into China, and in the second case, to the emergence of Theravāda Buddhism and its spread from Sri Lanka to the coastal lands of Southeast Asia

The original Sangha split into the first early schools (commonly believed to be the Sthaviravadins and the Mahasanghikas) a significant number of years after the death of Gautama Buddha; according to scholar Collett Cox "most scholars would agree that even though the roots of the earliest recognized groups predate Ashoka, their actual separation did not occur until after his death." Later, these first early schools split into further divisions such as the Sarvastivadins and the Dharmaguptakas, and ended up numbering, traditionally, about 18 or 20 schools. In fact, there are several overlapping lists of 18 schools preserved in the Buddhist tradition, totalling about twice as many, though some may be alternative names. It is thought likely that the number is merely conventional.

Karma as the law of cause and effect , Rebirth , The Four Noble Truths , The Noble Eightfold Path , Nirvana , Middle Way . Nirvana .

Śīla (Sanskrit) or sīla (Pāli) is usually translated into English as "virtuous behavior", "morality", "ethics" or "precept". It is an action committed through the body, speech, or mind, and involves an intentional effort. It is one of the three practices (sila, samadhi, and panya) and the second pāramitā. It refers to moral purity of thought, word, and deed. The four conditions of śīla are chastity, calmness, quiet, and extinguishment.

Samatha Meditation starts from being mindful of an object or idea, which is expanded to one's body, mind and entire surroundings, leading to a state of total concentration and tranquility (jhāna) There are many variations in the style of meditation, from sitting cross-legged or kneeling to chanting or walking. The most common method of meditation is to concentrate on one's breath (anapanasati), because this practice can lead to both samatha and vipassana'.

Buddhist art originated on the Indian subcontinent following the historical life of Siddhartha Gautama, 6th to 5th century BCE, and thereafter evolved by contact with other cultures as it spread throughout Asia and the world.

Early Buddhist art followed one Indian aniconic tradition, which avoids direct representation of the human figure. Around the 1st century CE an iconic period emerged lasting to this day which represents the Buddha in human form.

Buddhists generally classify themselves as either Theravada or Mahayana. This classification is also used by some scholars and is the one ordinarily used in the English language. An alternative scheme used by some scholars divides Buddhism into the following three traditions or geographical or cultural areas: Theravada, East Asian Buddhism and Tibetan Buddhism

The Pāli Tipitaka, which means "three baskets", refers to the Vinaya Pitaka, the Sutta Pitaka, and the Abhidhamma Pitaka. The Vinaya Pitaka contains disciplinary rules for the Buddhist monks and nuns, as well as explanations of why and how these rules were instituted, supporting material, and doctrinal clarification. The Sutta Pitaka contains discourses ascribed to Gautama Buddha. The Abhidhamma Pitaka contains material often described as systematic expositions of the Gautama Buddha's teachings.