These leaders will serve the player very well when trying to tackle the challenging Cultural Victory. Using these tactics, she should be able to rake in a ton of Culture from Trade Routes alone, not to mention the bonuses from the River Adjacency Bonuses. Wilhelmina should ensure that she has as many Trade Routes running as possible, and join Alliances to try to encourage other Civilizations to trade with her as well. Domestic Trade Routes generate +1 Loyalty in the starting City, and International Trade Routes to and from a Dutch city generate +1 Culture for the Netherlands. Radio Oranje improves Wilhelmina's Trade Routes, both domestic and international. Wilhelmina's Leader Ability is Radio Oranje. The Open-Air Museum also provides +2 Loyalty per turn to help make up for having to settle away from the Capital. This bonus is massive and really incentivizes spreading out cities to maximize the number of unique terrains in the empire for massive bonuses. These tile improvements can be built once per city, and give +2 Culture and +2 Tourism for each type of terrain (Snow, Tundra, Desert, Plains, and Grasslands) in the Swedish control. Recruiting Great People is always great, but in terms of Cultural Victories, Sweden's real treasure is their Open-Air Museum improvement. Whenever Sweden is in the game, three (usually Great Person-focused) World Congress Competitions are added to the game. Additionally, she generates +1 Great Engineer Points from Factories and +1 Great Scientist Points from Universities. To start, Sweden's Civilization Ability makes it so that whenever Kristina recruits a Great Person, she gains 50 Diplomatic Favor. Kristina is an absolute powerhouse in both the Cultural and Diplomatic Victory game. And if Pericles is generating a good amount of Culture without this bonus, then Pericles will be absolutely dominating the Culture generation. If done correctly and Pericles has perhaps 5 City-States under his control, then that's a whopping +25% Culture. This pairs exceptionally well with the Acropolis as it will give Pericles a distinct advantage to holding the Suzerainship of the City-States the entire game. Pericles' ability is Surrounded by Glory, and this ability grants Pericles +5% Culture per City-State that Pericles is the Suzerain of. Pericles is a much friendlier approach, capitalizing on the use of City-States to fuel his cultural growth.
Gorgo gets an early sprint in the Culture game if she is proactive with her military units, which lets her set up for a larger, more widespread Culture approach well-before any other Civilization is even close. She could also go to war with another Civilization, but Barbarians are largely a safer approach. Gorgo can excel at Culture, especially early on, by scouring the map in search of Barbarian Outposts to clear. With Gorgo, her Leader Ability is Thermopylae. Whenever Gorgo defeats an enemy unit, she is awarded Culture equal to 50% of that unit's Combat Strength.