strophic variation (theme and variation)

The quartet as a whole is subtitled "Emperor" because in the 2nd movement Haydn quotes the anthem he wrote, "God Save Emperor Francis."

Prelude in C major op.3 no.2

A string quintet has five string instruments, either as 2 violins, 2 violas and one violoncello (as the Mozart string quintets, K. 174, K. 515, K. 516, K. 516b (406), K. 593 & K. 614 or Brahms' 2 string quintets, op. 88 & op. 111) or as 2 violins, one viola and 2 violoncellos (as the numerous Boccherini string quintets). However there is another category with a standard string quartet and a double bass, sometimes referred to as a string quintet.

Serge Prokovfiev has written:

'String quartet no.1, op.50'