http://en.wikipedia.org/wiki/Flatbread
A flatbread is a simple bread made from flattened dough. Many flatbreads are unleavened�made without yeast or sourdough culture. They can range from a less than one millimeter to a few centimeters thick. Flatbread was already known in Ancient Egypt and Sumer.
Religious Significance
The term unleavened breads can also refer to breads which are not prepared with leavening agents. These flatbreads holds special religious significance to adherents of Judaism and Christianity. Jews consume unleavened breads such as Matzo during Passover. They are also used in the Christan liturgy when Christians perform the Eucharist, a rite derived from the Last Supper when Jesus broke bread with his disciples during a Passover Seder.
Examples:
Aish Mehahra (Egypt)
Barbari Bread (Persian)
Bazlama (Turkey)
Bhakri (India)
Chapati (India)
Crisp bread (Nordic)
Flammkuchen (Germany)
Flatbr�d (Norway)
Focaccia (Italy)
Green onion pancake (China)
Injera (Ethiopia)
Khanom buang (Thailand)
Kn�ckebr�d (Sweden)
Lavash (Eastern Mediterranean)
Laxoox (Somaliland)
Lefse (Nordic)
Luchi (East India and Bangladesh)
Malooga (Yemeni)
Matzo (Jewish)
Naan (Central and South Asia)
Ngome (Mali)
Pita (Eastern Mediterranean and Middle East)
Papadum (India, Sri Lanka)
Paratha (India, Sri Lanka)
Pide (Turkey)
Pizza is also based on flatbread.
Puri (India)
Roti (Central and South Asia)
Sanchuisanda (the Qiang people of China) -- made of wheat flour and is baked in ashes at the side of an open wood fire. The finished loaf is covered in ashes which are blown and patted off. The name literally means "three blows, three hits" and refe