The Moors and Arabs were more important in the reintroduction of ancient Greco-Roman knowledge for the posterior than the Byzantines.
There are indeed theories that the muslims in expansion (via Africa, Spain etc) were indeed the heirs to that Greco-Roman knowledge - and certainly they filled 'Spain' with it, prior to various destructive movements, such as Almanzor, the Almoravids and the later Catholic obsessive book burners!Why? Unlike muslims, the Othodox Chruch was biggot against every aspect of scientific discovery and anciet greco-roman science.
Yes, I already saw that line about the 'Celtisation' of the Iberian Peninsula, interrupted by the Romans, but in “Protohistoria de la Península Ibérica”, Martín Almagro et al, Ariel, in the chapter “Los Pueblos Prerromanos de la Península”, it is often mentioned the Iberization of some areas, in the Meseta, and in the area of the Turdetanos. If there was a Celtization and a Iberization, something had to be shrinking. There they even consider the Oretanos as Iberian, while in the map that I posted previously they are referred as Celtic speakers.The last Spanish ancient history book I read opined that the 'Celtisation' of Iberia was interupted by the Roman conquest and it deploys maps to show where Celts were (mainly central belts) and where older settlers were.
It is not possible, because even in the era of earliest renaissance Constantinaples had not big library anymore (what it used to be before the first millenia) and most of the remaining books were about history (monographs about the deeds of their emperors) or books about religious topics, they had no relationship with science and technology or arts.no most came from Greece/Byzantium.
These books were not about the "evil" ancient sciences.It is true that during Fourth crusade which turned against Byzantium in 1204 the most important imperial library was burned. Yet very rich libraries remained in Greece. In 1239–1240, the scholar Nikephoros Blemmydes found himself travelling long-distance, across the Aegean, from Asia Minor to Macedonia and Thessaly. He writes 'I spent a long time in these Western parts and worked extremely hard at the study of the books I found there; they were to be found in countless profusion, many of them difficult to find elsewhere, so much so that even the titles of some are unknown to many who have dedicated their lives to study.'