11. That looks like it was designed in the 16th century, 12. Caves 4 and from 6 to 10 are assignable to the sixth-seventh centuries AD . 13. It seems that it was built near 6th century. 14. But the Sir Richard Burton who lived a century before that 15. This is the media landscape as we knew it in the 20th century. 16. Were the telegraphers of the mid-19th century, 17. Famous Indian astronomer and mathematician of the 5th century A.D . 18. Caves 11 and 12 , which are unique , belong to the seventh century AD . 19. HIV infection, which causes AIDS, is perhaps the greatest new public health challenge this century. 20. For instance, this vision here from the early 20th century.
