Originally written for solo piano as part of the suite España, Op. 165 in 1890, the Tango in D is one of composer Issac Albéniz's most well-known work. Ironically, the transcribed version for classical guitar is more important today than the original piano piece. Personally, I love them both, but agree with general consensus that the guitar version breathes more life and Spanish flare into the piece. It's a juxtaposition of calm and serenity with the seductive rhythms of a tango.
If this is your first time getting to know Albéniz, I suggest you google the rest of his translated repertoire for classical guitar. They are definitely all gems!