tiruchirappalli is the administrative headquarters of tiruchirapalli district. it is the fourth-largest municipal corporation in tamil nadu. about 10,67,912 people lived there in 2008. it is a very old city with many important temples, monuments, churches and mosques. the famous temples being rockfort temple, srirangam temple, thiruvanaikkovil temple, samayapuram temple, nachiyar kovil etc. nearby, woraiyur, the old trichy, is where the early chola kings had their capital city, until about 850. there are picnic / sightseeing spots in and around trichy like kallanai (grand anaicut) built by karikala cholan, mukkombu.