They are called cryptologist.
A person who studies legends is called a folklorist. Folklorists research and analyze traditional stories, beliefs, customs, and other cultural expressions that have been passed down through generations.
A person who builds things out of stone is called a stonemason or a stoneworker.
There is no concrete historical evidence to prove that King Arthur was a real living person. The stories of King Arthur are largely based on folklore, legends, and myths rather than documented historical accounts.
That would be an archaeologist.
An archaeologist or an architectural historian typically studies ancient buildings.
A person who discovers things is typically called an explorer, inventor, scientist, or researcher, depending on the context of their discovery.
Botanists are people who study plants and nature.
a person who studys biographics
a scientist who studys cells are called what
The study specifically of fish is called Ichthyology. A person who works in that field would be an Ichthyologist.
someone who studys insects PS i would like to be one
A selenographer studys maps of the moon.
A legend is an unverified popular story handed down from earlier times. The word comes from the mediaeval French legende, an account of a saint's life, and ultimately from the Latin legenda, meaning " things that ought to be read." When we call a person " a legend" it means that the person is the subject of popular comment, much of which is untrue or unverifiable.
a cryologist
Geology.
a botanist
Geology.
Astronomer