Alright this is for everyone's info as to the land claims of Knoxville.
http://puu.sh/2CDJT.pngKnoxville is a city in name as well as an empire with wide tracks of land.
The total land claim includes the large tundra, the connected biomes, and the island in the south west.
With EP expanding the border of the world the land size increased.
Hakutown, Moriya, and Undine border Knoxville but are not part of it.
Future plans include a temple based on each of the 6 towers found in Knoxville city, Blackrose Manor, a town in Dust Valley, Wickerwitch Village, and faint echoes of a town by the name Brightburg to be build of quartz.
Currently there was one person building in Knoxville without permission, but since they are so far away I have left them. The current buildings by that person are not considered part of the empire, however they are free to join at any time. Anyone willing to build within the empire as part of it need acquire a deed. Keep in mind anyone that acquires a deed is subject to law and can only build what they request and where I see it fit to build.
As for Sol your arena would be best located somewhere within that black box on the image I posted.
In fact, I encourage you to build a city around the arena and give it the proper Roman city vibe.