Question: The graceful open?work spire was added in the 15th century by Johannes H??ltz of Cologne.
The spire was added in the the 15th century.

Answer: yes

Question: But try to make it sound authentic.'
Try and make it sound legit.

Answer: yes

Question: The larger hotels will usually hold a aGreek' evening on one night each week.
Traditional dances are taught by the local residents.

Answer:
it is not possible to tell