Which ancient texts contained regional histories of Buddhism and biographies of the Buddha?

Dipavamsa and Mahavamsa

As Buddhism spread to new regions like Sri Lanka, additional texts, such as the Dipavamsa and Mahavamsa, were composed, focusing on regional histories of Buddhism and containing biographies of the Buddha. Some of the oldest texts were recorded in Pali, while later compositions were in Sanskrit. As Buddhism expanded to East Asia, pilgrims like Fa Xian and Xuan Zang journeyed from China to India in search of texts, which they later translated upon their return to their homeland. Indian Buddhist teachers also undertook long journeys, carrying texts to disseminate the Buddha's teachings in faraway lands.