I want to know the answer to the following question:
Free-form pieces like nocturnes and preludes were a break from what era?
All the background I'm provided with is that "Musical forms began to break from the Classical era forms (even as those were being codified), with free-form pieces like nocturnes, fantasias, and preludes being written where accepted ideas about the exposition and development of themes were ignored or minimized.". Is that enough to answer the question?