Final answer:
In the Classical period in Western Europe, the patronage system began to decline, a rising middle class of merchants brought about the rise of a new audience and amateur musicians, and public concerts were established.
Step-by-step explanation:
In the Classical period in Western Europe, several new developments took place. One of these developments was the decline of the patronage system, which had been a dominant way of supporting artists and musicians. With the rise of a middle class of merchants, a new audience emerged and amateur musicians gained prominence. Additionally, the establishment of public concerts marked another new phenomenon during this period.
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