
Svapnavasavadatta (The dream of Vasavadatta) is a Sanskrit play in six acts written by the ancient Indian poet Bhasa. It is probably the best known of Bhāsa's works. The plot of the drama is drawn from the romantic narratives about the Vatsa king Udayana and Vasavadatta, the daughter of Pradyota, the ruler of Avanti, which were current in the poet's time and which seem to have captivated popular imagination. The main theme of the drama is the sorrow of Udayana for his queen Vasavadatta, believed by him to have perished in a fire, which was actually a rumour spread by Yaugandharayana, a minister of Udayana to compel his king to marry Padmavati, the daughter of the king of Magadha. It forms, in context, a continuation of his another drama, Pratijnayaugandharayana. The complete text of the Svapnavasavadatta was long lost until it was discovered in Kerala in 1912.
Author

Bhāsa is one of the earliest and most celebrated Indian playwrights in Sanskrit. However, very little is known about him. He is dated between the 2nd century BCE and 2nd century CE. Based on the language used, his date is also supposed to be around 5th century BC. The plays of Bhāsa had been lost for centuries. He was known only from mention in other works such as Kālidāsa's first play Malavikagnimitram, or the the famous text on poetics Kavyamimamsa written during 880–920 AD by Rajashekhara a famous poet, dramatist and critic. This was until 1912, when Mahamahopadhyaya T. Ganapati Sastri came upon 13 Sanskrit plays at a nampoothiri home named Manalikkara Madom (present Kanyakumari District) that were used in the Koodiyattam plays. Unlike other classical plays, none of them mentioned the author, but one was the Swapnavāsavadatta. Comparing the style of writing and techniques employed in these plays and based on the knowledge that Swapnavāsavadatta was Bhāsa's work, all of them were credited to him. Some scholars have disputed Bhāsa's authorship of all the plays but over the years the plays have generally come to be ascribed to him.