I think those dates lack some zeros, unless you mean centuries, which then you should specify it otherwise it looks like you're referring to years in the first century 🤔
20 AD is year 20 Anno Domini = after the birth of Christ / Christian Era
I think those dates lack some zeros, unless you mean centuries, which then you should specify it otherwise it looks like you're referring to years in the first century 🤔
20 AD is year 20 Anno Domini = after the birth of Christ / Christian Era
RE: A Brief History of the Development of Philosophy (from Ancient Greece to Modern)