Well, so far Poland got rulers and general vibe from its 'middle of 14th century medieval kingdom period' twice, being based only on the Piast dynasty ruling the country since 10th century.
The thing is, honestly Poland wasn't particularly unique at anything under Piast dynasty until late 14th century, in the context of medieval Europe as a whole. Like I am Polish and I struggle to think of anything that was particularly unique or huge here when compared with rest of the continent. This is largely because Poland like the entire Eastern and Northern Europe was very backward (already
) in comparision to West - Southern Europe, and it had to spend centuries clearing forests, urbanizing, developing fundamental stuff etc. I also didn't engage in any crazy military adventures, only fought closest neighbours and spend half of this period being divided into small duchies - again, not exactly a major civilization. There is even this saying about Casimir the Great (civ5 guy) that 'when he ascended Poland was wooden, when he left us it was from stone' - his father reunited the country, and Casimir actually begun the golden era that lasted next three centuries until like 1648 (everything went to hell from this year onwards).
The real fun beings from Casimir (ruled 1333 - 1370) to 1648, in the late medieval and early modern period, under Jagiellon dynasty and several competent elective kings. Poland got into personal union with Lithuania (and de facto a lot of Rus people) and they have in this period
- Developed extremely unique political system, which worked very nicely for a long time before turning into a failed state, being very succesful in multiethnic and multireligious harmony and political stability; especially in contrast to reformation and antisemitism of this era, PLC had world's highest Jewish population for a long time
- Was remarkably internally peaceful, stable and free of major civil wars in general
- Engaged in continental geopolitics and military adventures, clashing (and often beating) Teutons, Tatars, Ottomans, Russia, Swedish empire, Romanians and even Habsburg once; winged hussars come from this era, not from medieval one! The vast majority of well - documented great victories of Polish history come from this era
- Had flourishing art, architecture and culture of Gothic, Renaissance and Baroque (there are very few remaining buildings in Poland from before late 14th century)
- Had decent enough scientific infrastructure, especially in mathematics, physics and philosophy, to produce Copernicus, which is probably the only AAA - global - tier Polish scientist from before 19th century (there were also several other very accomplished scholars from this era, but not as well known). Unfortunately it already got into decline by the late 16th century, and PLC contained very few universities when compared with big Western countries (it's a miracle that it has somehow managed to produce Copernicus)
An important thing to note is the fact it was not purely
Poland, Poles were like 40 - 50% of its population; second largest group were Ruthenian people of Belarus and Ukraine, then there were Jews and Lithuanians and several other minorities (including Armenians and even like 20 thousand Muslim Tatars). And that's without counting German, Latvian and Moldavian vassals. Personally I'd be more comfortable if it was
Poland - Lithuania instead of just
Poland. But some Lithuanians have mixed feelings about this periods, considering themselves culturally marginalized and Polonized in this era and preferring prior independent Lithuanian empire, so I'm not sure what I'd do as a developer.
Personally I'd suggest
- Too many good leaders with great personalities in this period to focus on one, the most spectacular would be probably Władysław Jagiełło (ethnically and culturally Lithuanian but there is not a single person in Poland who would deny that or have a problem with that). Less spectacular but next best rated candidates overall could be Sigismund I the Old, Sigismund II Augustus (both still largely Lithuanian but no one has a problem with that anyway) and Stephen Báthory (Romanian/Hungarian, still nobody cares about that). There are many good leaders besides them, but they all have some slight or major controversies and downsides. Jan III Sobieski for example was a great man in the time of miserable decline even he couldn't stop; I'd also vastly prefer Polish leader with the 'peace and tolerance' agenda than an icon of 'religious defence'
- Well I guess winged hussars would remain in this scenario, if we focused on this period, although there were few other remarkable formations.
- My main idea for a district would be Sejmik (local parliament, its character and name very unique to PLC). It has some negative connotations with the later failed state, but actually it was very functional institution for a long time before its degeneration.
- Abilities focusing on diplomacy, stability, tolerance, unique government system and gov abilities, economy and architecture would be very welcome for me, way more than "brave religious horsemen" stereotype of Poland in those kinds of games
(I know its largely positive stereotype)
https://en.wikipedia.org/wiki/Gothic_architecture_in_modern_Poland
https://en.wikipedia.org/wiki/Battle_of_Grunwald
https://en.wikipedia.org/wiki/Renaissance_in_Poland
https://en.wikipedia.org/wiki/History_of_Poland_during_the_Jagiellonian_dynasty
https://en.wikipedia.org/wiki/Battle_of_Kircholm
Also for territorial comparision:
Casimir the Great, red stuff is when he began with
Furthest extent of early modern Poland - Lithuania