Patrimonio Nacional will make the codices of Alfonso X’sCantigas de Santa Maria, housed in the Real Biblioteca de San Lorenzo de El Escorial, accessible to the public online via this link (https://rbdigital.realbiblioteca.es/s/rbme/item/11337#?c=&m=&s=&cv=&xywh=-2321%2C-312%2C8384%2C6239).
Read more here: https://elpais.com/cultura/2021-06-13/patrimonio-libera-los-codices-de-las-cantigas-de-alfonso-x.html
Alfonso X Codices Now Available Online