Which type of city would be surrounded by walls or barriers? Symbol of wealth and power
Fortress
Opposite of country
Marketplace

Moscow (/ˈmɒskoʊ/, /ˈmɒskaʊ/;[10][11] Russian: Москва, tr. Moskva, IPA: [mɐˈskva] (About this soundlisten)) is the capital and largest city of Russia. The city stands on the Moskva River in Central Russia, with a population estimated at 12.4 million residents within the city limits,[12] over 17 million residents in the urban area,[13] and over 20 million residents in the Moscow Metropolitan Area.[14] The city covers an area of 2,511 square kilometres (970 sq mi), while the urban area covers 5,891 square kilometres (2,275 sq mi),[13] and the metropolitan area covers over 26,000 square kilometres (10,000 sq mi).[14] Moscow is among the world's largest cities, being the largest city entirely in Europe, the largest urban area in Europe,[13] the largest metropolitan area in Europe,[14] and the largest city by land area on the European continent.[15]

I would say a Fortress

Explanation: A Fortress is like a for that is fortified like a castle.

(a).national trade check first good luck