Did Charlemagne spread his empire to what is now far into modern Spain?

Yes, Charlemagne expanded his empire into parts of modern Spain during his reign in the late 8th and early 9th centuries. He conducted military campaigns against the Muslim-ruled territories in the Iberian Peninsula, establishing the Marca Hispanica, a buffer zone that included regions like Catalonia. However, his control was limited and primarily focused on the northeastern part of Spain, as significant portions remained under Muslim rule.