Capital city

[PC gamer]

I've been thinking, if there already is a way for marking a town a city (bigger and grows faster)
why not make one city on the map the capital, it would be twice as big as a city (usually) and will grow even faster.

PS:I got this idea when I was playing openttd and suddenly I heard the song Capitol City and I named the biggest town after that.

[DJ Nekkid]

even with slow growrate, a well serviced city of 3000ppl will grow to 10x or more of that in 30-40 years...