Context: 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:

Question: What is the oldest architecture plans that has survived?
Answer: De architectura

Question: Who created the oldest surviving architecture plans?
Answer: Roman architect Vitruvius

Question: When did Vitruvius create these plans?
Answer: 1st century AD.

Question: What are the three principles every plan should consider?
Answer: firmness, commodity and delight.

Question: What is the first known extant writing about architecture called?
Answer: De architectura

Question: Who was the author of  De architectura?
Answer: Vitruvius

Question: What was Vitruvius' profession?
Answer: architect

Question: What were Vitruvius' three principles for a well made building?
Answer: firmitas, utilitas, venustas

Question: What is the commonly seen English translation of the three principles?
Answer: firmness, commodity and delight

Question: What is the youngest architecture plans that has survived?
Answer: Unanswerable

Question: Who created the most recent surviving architecture plans?
Answer: Unanswerable

Question: What was written in the 2nd century AD?
Answer: Unanswerable

Question:  What was Vitruvius' fourth principles for a well made building?
Answer: Unanswerable

Question:  What is the commonly seen French translation of the three principles?
Answer: Unanswerable