Context: Texts on architecture have been written since ancient time. These texts provided both general advice and specific formal prescriptions or canons. Some examples of canons are found in the writings of the 1st-century BCE Roman Architect Vitruvius. Some of the most important early examples of canonic architecture are religious.

Question: When were architectural writings first made?
Answer: ancient time

Question: Aside from general advice what did the texts contain?
Answer: specific formal prescriptions

Question: What is another term for specific formal prescriptions?
Answer: canons

Question: When did Vitruvius write his canons?
Answer: 1st-century BCE

Question: What is a significant early architectural canonical type?
Answer: religious

Question:  When were architectural writings last made?
Answer: Unanswerable

Question:  Aside from general advice what did the texts not contain?
Answer: Unanswerable

Question:  What is another term for specific informal prescriptions?
Answer: Unanswerable

Question: Who wrote canons in 2nd century BCE?
Answer: Unanswerable

Question:  What is an insignificant early architectural canonical type?
Answer: Unanswerable