There is evidence showing the embayment of tessera by pdl's material in some tessera margins. This room features a mosaic made from tessera produced in the Vatican workshop. Convection throughout the lava pond resulted in surface deformation that created tessera terrain. This model requires that the material comprising tessera terrain is continental in nature. Multiple models have been put forward to explain the formation of tessera terrain. Future missions to Venus would allow for further understanding of tessera terrain. The material for the tessera is produced by Smaltfactory in Moscow. During meetings, all the prayers of the Tessera are said. Large regions of tessera terrain are labelled based on their latitude. They pray the whole booklet of Legion prayers, the Tessera, every day. Siimpel was later acquired by Tessera. Thus, it is possible that this unit is younger than the tessera unit. This tessera is at the museum in Damascus. The boundaries of tessera shows embayment by other materials of other units.