What years were in the seventeenth century?
The 17th century began in 1601 and ended in 1700.
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.