And in assessing my city for culture replacement, it is difficult because I have almost zero non-producing culture. Nearly everything is producing population or goods or both. (I have a few lamposts scattered, decorative, lol. I have a few frozen flames and codexes. And a couple unicorns that are culture only, but they're staying with the collection, lol). Replacing goods-producing culture isn't too difficult as higher yields are an easy choice, but losing population-bearing culture means that number of pop setback so not sure about getting rid of those. I'm not totally sure that I'm in need of culture-culling, though.
Edit: I just finished a spreadsheet listing every item that produces culture, pop, goods, etc and set it up to calculate per tile culture and ordered the data according to highest per tile culture. Learned a few of my culture only pieces are in the top slots for culture/tile value (so not so wasted even though not producing anything else) and learned the days are numbered for my Festive May Tree (ch.3,lvl.7), which has the lowest per tile rating and though it does produce, its population is not a huge setback and other production values have been helpful, but not significant enough to earn itself off the chopping block (I think...). Even an unevolved/base level Witch's Hut (ch.6) has nearly five times the per/tile culture value [haven't placed Witch's Hut yet and have three artifacts (ch.7), which haven't been taken into consideration in spreadsheet.] This is probably an example of replacing old culture with new. Higher chapters produce more and as you move up, the items acquired in lower chapters don't pull their weight anymore.