Sorry for the late reply ^^' Both me and Bluari has been a bit under the weather lately.
We made the decision to draw the line after Renaissance. We know there's plenty of awesomeness afterwards in late renaissance, the era of revolution, the industrialism, victorian and so forth. But we decided to keep this as close to classic fantasy and old folklore as we could.
The one exeption we have is the folder "Fantasy - Not connected to folklore" which can be a mixed pot of pretty much anything fantasy.