The Renaissance was a fervent period of European cultural, artistic, political and economic “rebirth” following the Middle Ages. Generally described as taking place from the 14th century to the 17th century, the Renaissance promoted the rediscovery of classical philosophy, literature and art
I would start with the ground up and keep thin outside lining when doing the trees :)
Anthropomorphic involves the act of giving the characteristics of humans to other things. This is an imagery used where human characteristics are given to non-living things. I think it is being used since it can depict certain factors in the human life but still being subtle about it. Another reason is that it shows creativity in the work.