I used the freeciv-score.log and the last savefile (both provided by akfaew, thanks!) and a modified small script by Ragnar Ouchterlony to generate some graphs about the game, perhaps this is interesting for others too.
There are two "galleries", one encompassing the whole game, and the other only up to T80 (if there is interest in other ranges or so, just ask - I took this one because I think the caravan trick was discovered around T80). One image is called "colorkey", which contains the corresponcence player <-> color. I used the colors which were also the nation colors ingame.
Up to T80:
Thanks for taking the time to do this, dvgo!
https://s32.postimg.org/tb6z119pv/settlers.png - I can clearly see my age of colonialism, and someones attempt at disbanding their cities
If you can't beat them, join them. If you can't join them and are going to get beat... then burn all your cities to the ground before they get them!!