What type of figures are pictured above? what is known about these figures by historians?

These figures are votives, which traditionally hold religious significance and were most likely dedicated to the gods. They are limestone statues. They are an examples of the traditional way Sumerians represented forms, with simplified faces and bodies, and with clothing that emphasized the cylindrical shape and the styles of the time. The bulging eyes indicate the openness they had when approaching a god.

Simple Answer - These figures are votives, which traditionally hold religious significance and were most likely dedicated to the gods. They are limestone statues.

Explanation:

lithograph is created by etching the flat surface of a print.