La Catedral is a great piece composed by Agustin Barrios Mangore. The last two movements were composed earlier in his life and then he added the first movement (the one in this teaching video) later in life. He reworked this piece throughout his life and you will find multiple versions of it. For more information about La Catedral I would recommend checking out: https://www.savarese.org/music/LaCatedral.html
Agustin Barrios was a guitar composer and composed a lot of really good pieces. He was born in Paraguay and was praised for his concerts as well as recordings. If you don’t know this composer I would highly recommend checking out his other pieces. I hope you enjoy this teaching video. For more videos like this please check out my guitar school found at my website.