The orchestral repertoire necessarily pivots around Beethoven and Brahms, since the orchestra is defined by their work and, by contrast, their work in its pursuit of the symphonic ideal. ‘Repertoire’ charts the history of the repertoire, how it has changed, and where it sits today. In most places, and during most eras, the repertoire has been in a state of constant movement, led by conductor enthusiasm, audience demand, academic scholarship, and the individual quests of living composers. Confecting the programs, both the individual concerts and across a season, is a balancing act which takes a few years to achieve. The skill is to balance degrees of celebrity and familiarity with space to explore.