Abbot Oliba
Ripoll was the most critical scriptorium in Catalonia. With help from things he learned at Ripoll, Pope Sylvester II introduced the Arabic numbers, the concept of zero, and the astrolabe to Europe.  During Oliba's time, the library at Ripoll gained three the number of pieces of writing; together with the Bobbio, it became one of the most important libraries in the Christian world during the middle ages.