Linked from
The 11 pages that link to Viola, each with the reason it gives.
ViolinCompared with: Its darker register complements the violin in chamber and orchestral music.
CelloCompared with: The viola shares the cello’s open-string pitches but sounds an octave higher.
String orchestraRelated: Violas supply inner harmonies between the violins and lower strings.
William WaltonRelated: Walton made the viola a compelling solo voice in his concerto.
ClefRelated: Viola music commonly uses alto clef to avoid excessive ledger lines.
Lionel TertisNarrower topic: Tertis’s performances made this instrument a prominent solo voice.