It has to be the seat of the government of the country or province. Some countries such as South Africa have more than one capital, because different branches of government meet in different cities (the Parliament meets in Cape Town, but the President lives in Pretoria and the judiciary is located in Bloemfontein). Others, such as the Netherlands, have an official capital and a de facto capital (Amsterdam and Den Haag respectively).
Bratislava become capital in 14.03.1939 to 1945 then was renewed Czechoslovakia and 1.1.1993 Bratislava become capital again.
Bucharest become the capital of Principatele Unite at 24 January 1859.
Delhi become the capital of India in 1900 by the britishers.
How did Washington DC become the nations capital
Honolulu is the capital of Hawaii
The Capital was moved from Sitka in 1906.
It Became The Capital In 1955
Kaskaskia Became the capital in 1818.
June 24th, 1976
when did belmopan become capital
Ukraine is not a capital it is a country, its capital city is called Kiev.
It depends on which state you are referring to.