Question:  Poème élégiaque in D minor was dedicated to a composer whose best-known works are "Pavane", "Après un rêve" and what? 
Sentence (from "Poème élégiaque in D minor, Op.12 (Ysaÿe)"): The piece first took shape around 1892-1896, but achieved its final orchestrated form in 1902-1903.
Relevant evidence: No