The illustrated manuscript 'Astasahasrika Prajnaparamita' is a seminal text of:

The correct option is Mahayana Buddhism.

Explanation

The Astasahasrika Prajnaparamita ("Perfection of Wisdom in Eight Thousand Lines") is one of the earliest and most significant sutras in Mahayana Buddhism.

Detailed Analysis:

• The text expounds on the concept of Prajnaparamita (Perfection of Wisdom), which is central to the Mahayana path of the Bodhisattva. It focuses heavily on the philosophy of Sunyata (Emptiness).
• It was composed in Sanskrit (specifically Buddhist Hybrid Sanskrit), distinguishing it from early Theravada texts written in Pali.
• Historically, this text is renowned for being the subject of numerous illustrated palm-leaf manuscripts, particularly from the Pala period (8th to 12th century CE) in Eastern India. These manuscripts represent some of the earliest examples of miniature painting in India.
• It is unrelated to Jainism, Vaishnavism, or Shaivism, which possess distinct canonical texts (e.g., Agamas for Jainism, Puranas and Agamas for Hindu sects).

Key Takeaway: The Astasahasrika Prajnaparamita is a foundational Sanskrit text of Mahayana Buddhism, celebrated for its philosophical depth regarding Emptiness and its artistic significance in Pala school miniature paintings.