The Sebastianyotho series was launched in 2018 on the occasion of Sebastian P. Brock's 80th birthday to celebrate his prolific contributions to the field of Syriac studies for over half a century. Each volume in the series collects his works on a specific theme and includes new material. Covering a wide range of topics, the series becomes an indispensable encyclopedia on Syriac Christianity. The title of the series is formed from Sebastian, as he is called by his colleagues and students—a testimony to his humility, and the Syriac suffix -yotho creating a plural abstract noun that denotes the idea and quality of Brock and his work.