Swami Dayanand Saraswati​

Dayananda Saraswati was an Indian philosopher, social leader and founder of the Arya Samaj, a reform movement of the Vedic dharma.

Explanation:

after the roman empire fell, some of its cultural achievements lasted for some time and others were lost. lost achievements include architecture , coins, and literacy. however, several things remained, such as the language. people may not have spoken this language in every city, but it influenced the languages they did speak. they also created the julian , which was commonly used until the eighteenth century.