Goods are very valuable items that are essential for generating <l:6,92>gold<e>. Goods are found on certain terrain tiles. Each good has a value in gold which a <l:6,104>city<e> can collect by assigning someone to work on the tile. A Civilization can monopolize a good by collecting many identical goods in one city; the larger the monopoly, the more gold the Civilization will generate. However, each city can only support four trade routes traveling into the city and four traveling out. Through <l:6,58>trade<e>, the Civilization can move goods to specific cities that are forming a monopoly on that good, thereby maximizing the city's gold.