There are several possibilities:
An archaeologist or an architectural historian typically studies ancient buildings.
An archaeologist is a person who studies the past by digging up and examining artifacts, structures, and other remains left behind by ancient civilizations.
A person who studies the history of medicine is known as a medical historian. This individual examines the evolution of medical practices, beliefs, and discoveries throughout history to better understand the development of medicine as a field.
A person who studies prehistoric times is called an archaeologist. Archaeologists study ancient human societies by analyzing artifacts, structures, and other physical remains to better understand past cultures and civilizations.
An anthropologist who studies ancient bones is called a bioarchaeologist or a physical anthropologist. They analyze skeletal remains to learn about past populations, their health, diet, and lifestyles.
An astronomer.
A person who studies ground water is called a hydrogeologist. They specialize in studying the occurrence, movement, and properties of groundwater within the Earth's subsurface.
a person who studies people but not an psychologist
A person who studies genealogies is a genealogist.
A person who studies organisms is called a biologist.
a person that studies gems is called a gemologist.
what do you call somebody who studies snails.
A person who studies poisons is called a toxicologist.
A person who studies the earth is called a geologist.
A person who studies birds is called an ornithologist.
A person who studies the mind is called a psychologist.
A person who studies birds is called an Ornitholoigst