Who? What did he start?

X was first sighted by A in the late 16th century. A song written by B partly shares its name with X. Id X,A,B. X A B

OK,easy one! What is that one name that would fill the blackened spot? p.s- click chart to enlarge

A, an 18th century personality manufactured instruments which the character created by B was often seen playing. Who was A? What was he know...

She was the first of a kind. Who is she?

IMAGES OF WHAT?

CONNECT! a b c

WHAT'S SHE CREDITED WITH?

IDENTIFY THE STRUCTURE. WHO BUILT IT? the 2nd picture shows a portion of the interior.

HE WAS A FRENCH MATHEMATICIAN, PHILOSOPHER AND PHYSICIST. HIS INFLUENCE IN THE WORLD OF MATHEMATICS IS CLEAR WITH HIS INVENTION OF A CERTAIN...