generate questions: The earliest surviving written work on the subject of architecture is De architectura, by the Roman architect Vitruvius in the early 1st century AD. According to Vitruvius, a good building should satisfy the three principles of firmitas, utilitas, venustas, commonly known by the original translation – firmness, commodity and delight. An equivalent in modern English would be:
What is the oldest architecture plans that has survived? {sep_token} Who created the oldest surviving architecture plans? {sep_token} When did Vitruvius create these plans? {sep_token} What are the three principles every plan should consider? {sep_token} What is the first known extant writing about architecture called? {sep_token} Who was the author of  De architectura? {sep_token} What was Vitruvius' profession? {sep_token} What were Vitruvius' three principles for a well made building? {sep_token} What is the commonly seen English translation of the three principles?