The boundaries of Europe and Asia are the Urals, Caucuses, Caspian Sea, Black Sea, Bosporus Strait, and Mediterranean Sea.
Europe has many boundaries and borders, but Europe as a land mass stretches from the Hebrides and Iberian peninsula in the west all the way to the Polish - Ukrainian border in the north east and the Romanian - Turkish border in the south east.
The Mediterranean Sea is between Europe and the middle east.
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The Ottomans grew wealthy by taxing trade between Europe and East Asia.
Trade between Europe and the East increased.
Trade between Europe and the East increased.
Trade between Europe and the East increased.
Trade between Europe and the East increased.
The Crusades increased the population of trade between Europe and the Middle East.
Trade between Europe and the East increased.
Poland is in eastern Europe. It has land boundaries with other countries to the west, south and east. However, to the north is the Baltic Sea.
Europe does not really have a boundary with the Middle East. Turkey is between Europe and the Middle East and you could say the Caucasus mountains separate Europe from countries that are close to the Middle East, so that may be the answer you are looking for.