Topic: Reworking ancient art

The bulk update request #13699 is pending approval.

Reason: Based on a discussion on topic #61874 a while back. Basically it went from "moving the year of ancient art" to "reworking the whole thing because it's unclear". This is the second attempt of topic #61964

So here's what needed to be changed if this BUR is approved, this would be the general result later on:

ancient art split up into "[XYZ] period"

• ancient: dawn of time - 500CE
• medieval: 501 - 1500
• early modern: 1501 - 1900
• modern: 1901 - 1970 or 1980

Simply imply their respective century with the period (unless it's before common era because it's easier), while for modern period, it will be manually imply with individual years due to overlapping, leaving anything after 1970 "present day" art (or 1980 if we want to keep that)

The bulk update request #13700 is pending approval.

Reason: The second part of the process

I'm generally okay with reorganizing these periods of art, but it seems unnecessarily arbitrary to have "modern period" start at 1901 and end at 1970 or 1980, when all the others are aligned cleanly on century boundaries. Especially when the 70s, 80s, and 90s are more modern than the earlier decades. Why not have the "modern period" cover the whole 20th century? That way, the 20th_century tag itself functions as that period, and we don't need to do anything for it. Or maybe include the 19th century as the modern period, so the 16th, 17th, and 18th centuries imply early modern period, and the 19th and 20th centuries imply modern_period.

I still think there is value in an umbrella tag for works with an uncertain date of creation.
Like a work dated to around 1450-1550 would be left outside of this scheme.

My main critique is that generally the start of the Modern period is considered to be 1850 with it's end in the 1950s or 1960s, with what comes after being the Post-Modern period which we're still in (or at least we're still in as of 2016ish when I finished my degree, I haven't kept up with the academic side of things so I might be outdated)