Every sovereign country has at least one capital — a city that hosts the government, embassies, and the official seat of state power. Across all 197 UN-member states, the capitals reveal patterns: colonial-era planners often picked the inland alternative to the port; constitutional documents sometimes split the role across two or three cities; a handful of capitals share a name with their country; and the smallest national capital by resident population has fewer people than a small village.

Easy to confuse, hard to ace: Central Asian capitals that look phonetically similar at a glance; Pacific micronation capitals you may not have heard outside a geography quiz; African and Asian countries that relocated their seat of government in the mid-twentieth century. The easiest end of the difficulty curve is the capitals you hear in the news every week.

Pick a mode and start. Type-in is the deep-end recall mode; multiple choice is the warm-up; tile select sorts the continent's capitals from distractor capitals under the clock; match pairs each capital to its country across regional rounds; click-the-map asks you to click the country whose capital is shown. Every mode counts toward your topic mastery.