They had sex with children
Immigration, ever since the 1600's
The English created the sport. It was first played in th 1600's but since then, it has changed a bit
The orchestra hasn't changed much. it has changed but only little things it isn't a huge change. the orchestra in 1600 was really old fashioned and they changed it by making it more modern.
In the early 1600's, the "Telescope" was invented, this in turn changed astronomy forever.
Well, its pretty easy . Count to 34 and you will get the answer .
it would be something about clothing, music, dancing, etc.
Some parts of Kenilworth castle changed because lots of weapons became more advanced so it needed to be changed so the castle can still stand. In the 1600 Kenilworth castle had an extra wall, great hall, causeway and an Elizabethan palace rooms.
the dodo bird (since the 1600's)
about 400
This would be difficult to answer, except at random, since there have been thousands of monuments built since 1600. Would you care to concentrate on one theme or country?
Since the numbers 21 and 1600 share no common positive integer factors other than 1, the proper fraction 21/1600 is already expressed in its simplest form.
Since the 1600's.