You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Martin_Luther

Context:
Luther next set about reversing or modifying the new church practices. By working alongside the authorities to restore public order, he signalled his reinvention as a conservative force within the Reformation. After banishing the Zwickau prophets, he now faced a battle against not only the established Church but also the radical reformers who threatened the new order by fomenting social unrest and violence.

Question:
Besides the radicals who else did Luther have to deal with?

established Church