Pita bread is a type of flat bread, usually baked so that it is hollow in the center and can be stuffed with other foods. In the United States, it is considered to be Greek, and expected at Greek restaurants and meals. But its origins are debated. While it is likely that the ancient Minoans had a similar type of bread, many modern Greeks see it as an unwelcome reminder of the Ottoman Occupation, when many foreign foods were introduced and adopted by Greece.
Pita is often found in conjunction with a another word which has evolved outside of Greece - the "gyros". These days, gyros meat is usually a preformed piece of meat revolving on an upright spit, but it originally referred to roasted intenstines wrapped around a horizontal skewer. Then it acquired another meaning of slices of meat strung onto a cooking spit and then either sliced off or slid off for eating.
Since gyros are popular with tourists, and with Greeks seeking a fast bite, you can find "American-style" gyros in Greece.
