Which features of past European music did Igor Stravinsky adapt in his Neoclassical works?

In his Neoclassical works, Igor Stravinsky utilized past European music—such as the Baroque era or the styles of specific historical composers—as a starting point for his own highly personal and unorthodox compositions.1

Key features of his approach included:

• Historical Models: He often took a particular composer’s work or a specific historical style as a reference point, relying on the listener's familiarity with these models to achieve his intended effect.1
• Harmonic Language: Stravinsky reverted to a clear harmonic language reminiscent of the 18th century. However, he treated these classical harmonies in isolation, moving them freely from one to another without adhering to their traditional functional roles.2
• Structural Detachment: His instrumental works from this period, such as the Octet for Wind Instruments and Concerto for Piano and Wind Instruments, combined Neoclassical style with a self-conscious severity of line and texture, often characterized by a "cool detachment".1
• Pastiche and Adaptation: In works like The Rake’s Progress, he created a mock-serious pastiche of late 18th-century grand opera, blending historical references with his own signature brilliance and wit.1