Which techqnique involves painting on a freshly plastered wall and was popular during the greekromanmedievaland renaissance periods?

The technique you're referring to is called "fresco." It involves applying water-based pigments onto freshly laid wet plaster, allowing the paint to become an integral part of the wall as it dries. Frescoes were widely used in ancient Greek and Roman art and continued to be popular during the Medieval and Renaissance periods, exemplified by works like Michelangelo's Sistine Chapel ceiling. This method is prized for its durability and the vibrancy of colors that can be achieved.