By the standards of South Korea’s teeming metropolises, Sejong is not much of a city. With a population of 400,000 people, Sejong, a planned city located about 100km (62 miles) south of Seoul, does not even crack the top 20 urban centres.

After months of political turmoil, South Koreans will head to the polls Tuesday to elect a president to succeed disgraced former leader Yoon Suk Yeol, who was ousted from office over his ill-fated decision to impose martial law in December.

Thousands of supporters of South Korea's two leading presidential candidates rallied on Saturday in Seoul, days before a vote triggered by the ex-leader's disastrous declaration of martial law.