Due to its strategic location, Cheonan has also been an important postal center where early communications from the south converged before heading to Seoul, or where messages from the capital diverged into the southern regions. More formal and structured mail services later emerged with the construction of the city's first postal outlets, and the entire history of mail service in Cheonan (and in South Korea in general since 1883) is now on display in the country's largest postal museum in Yang-ji-mal in eastern Cheonan.