The decoration of potteries was very important in prehistoric and before protoliterate periods. The structure and motives on the ceramics accommodate the possibility of the study about ancient human thoughts and demonstrate the dependence of his ideas and minds on the natural and social environments in which he has lived and grew up. Therefore, by examining these motives, one can study and analyze the mental, ideological, social and economic complexities of ancient societies. The authors have studied the organization of pottery production in an ancient society by researching the "grammar" of motives and aesthetic quality of prehistoric painted pottery. The culture of Tall-e-Bakun A which has prevailed in Marvdasht plain in Fars Province at the end of 5^th and the beginning of 4^th millennium BCE, is the case study of this investigation.

The ceramics have been produced in a standardized productive organization and a specialized process during Bakun A phase. Requirements and rules have been used in creating patterns on pottery of this period, the most important of which are: placing motifs in frames, symmetry, repetition, reversing and clockwise direction of motifs, creating motifs with negative technique and using separating elements. This study also has proved that the relationship between the designs and the forms of the potteries has been relative. The grammar and method of motives on jars, cups and bowls have shown that often the same patterns and models are used in their execution. The execution of them.