This square is the central point of the city where locals and visitors get the chance to meet. The main streets of the old part of town start here and lead tourists to the principal historical sites. You can also board the tourist train here for a ride round Toledo. Traditional markets, such as the famous “Martes” (Tuesday market) still take place in this square. Great bullfights, fiestas and macabre executions have also taken place here. During the Muslim era this was the location of the old cattle market (“Tulaytula”) built on top of the ruins of the Roman wall.
From: http://www.mytravelguide.com/attractions/profile-79297905-Spain_Toledo_Plaza_de_Zocodover.html