"Tristan and Isolde is an opera in three acts by Richard Wagner to a German libretto by the composer, based on the romance by Gottfried von Strassburg. It was composed between 1856 and 1859 and premiered in Munich on 10 June 1865 with Hans von Bulow conducting."
"Wagner composition of Tristan and Isolde was inspired by his affair with Mathilda Wesendonck and the philosophy of Arthur Schopenhauer. Widely acknowledged as one of the peaks of the operatic repertory. Tristan was notable for Wagner's advanced use of chromaticism, tonality, orchestral color and harmonic suspension." (from Wikipedia)
I had had the good fortune in November of 1955 to attend to the opera of Tristan and Isolde at the Hungarian Opera House in Budapest. It was an unforgettable evening for me.
Unfortunately I do not have chances like that anymore, and that is why I was so thrilled few days ago when listening to BBC Radio 3's live production from the Royal Opera House, Covent Garden. (Antonio Pappano conductor, tenor Ben Heppner and soprano Nina Stemme as the tragic lovers.)