As Greece also consists of many islands, there is not much room to grow crops. Although it was difficult for them to grow crops, they were able to grow herbs and vegetables well, especially olives, and they also regularly used bees for their honey. Greece is full of marble quarries. they used it in their architecture which is still considered beautiful. Thanks to the strength of the stone, they were able to build buildings much larger and more spacious than those in other countries. Their mathematicians designed the buildings so that they could use materials more efficiently, and they aligned the buildings so that the perspective matched the surroundings. The main trades of Greece were pottery and ironwork which were almost entirely produced by slaves. it also represented a large part of the trading economy because Greece's geographical location made it easy to access metal ore and clay. two other major exports from Greece were olive oil and wine. Part of the trading system was their currency, which was different for each city-state. Coins were first made of gold and silver, then bronze coins were introduced later. The monetary system made a profit every time someone wanted to make a currency exchange when entering a new