The following buildings can be constructed in a Seowon:
Also make sure to build the Seowon away from other districts (including City Centers and Aqueducts), each of which will subtract 1 from its base Science yield of 4. The only exception is the Government Plaza, whose own built-in bonus cancels the penalty.
Even though its base Science yield of 4 is not described as an adjacency bonus, it does still benefit from adjacency bonus modifiers like the Natural Philosophy policy, allowing for an even bigger early-game tech lead (though at the cost of a valuable policy card slot). When possible, the Golden Age Dedication "Heartbeat of Steam" should be picked: combined with Natural Philosophy, your Seowons can produce up to 8 Science and Production.
In Gathering Storm, the power level of the Seowon is significantly hampered even though there is no direct nerf to this district. The regular Campus is now the easiest district to give a high starting adjacency bonus, due to major bonuses next to Reefs and Geothermal Fissures and many curvy mountain ranges on the map (thanks to new map generations). On certain map types (most notably, Primordial, where Mountains and Geothermal Fissures appear in huge numbers), the Seowon even pales somewhat when compared to its counterpart, since its Science is capped at 4 and can only scale downward.
An educational crisis in 16th Century Korea brought about the seowon, a private institution designed to fill the scholarly void. The heavy emphasis on Confucian teachings and rituals were often expressed in the modest appearance of its structures. The preponderance of aristocratic children attending made the seowon ideal for discussing politics. This blend of Neo-Confucianism and topical matters created an ideal setting to explore new ideas about Korea’s contemporary culture and government.