What century was 1603 in?

Answer 1

1603 is in the seventeenth century.

(You might think it should be in the 16th, but the 1600's are in the 17th century is because there was no zero-th century. The first century ran from year 1 to 100.

years 101 through 199 are in the second century; years 201 to 299 are in the third century, etc.

People like to argue about what century 100,200,300,.. 1600 are in.