Sir Peter de Ia Mare was an English politician who is best remembered as the Presiding Officer of the House of Commons during the Good Parliament of 1376. Soon after parliament was called, its members chose Sir Peter to be their spokesman. He thus became the first man to be recognized as Speaker of the House of Commons.
Sir Peter played an important role in the impeachment of various corrupt officials, including the close friends of the king. However, he was later imprisoned by John Gaunt, the third son of the king, to whom the king had handed over the reins of government. The impeachments were also reversed by the next parliament, which was packed with Gaunt’s supporters.