Two questions: what do the numbers in the second column signify, and how many other cities did you build to serve the needs of your capital.
As CKS already suggested: the total number of culture earned by that building.
And I built quite a few cities: after the Temple, I used my capital as 4-turn settler factory. I knew that on Deity it is not worth trying to compete for the early Wonders. And I knew that I would need two strong cores in order to be able to compete with the AI research-wise. (A lesson well learned in the Warlord 20K game last summer... See GOTM 169. There I was stuck on my 1-city island, and even though I got most of the ancient Wonders, I lost all of the later Wonders since the AI already finished them, before I even had the prerequisite technologies...) So I founded the first ring and part of the second ring, while waiting for Literature. When it was time to concentrate on culture again, other towns were able to take over the job of expanding further. I quickly built two rings around the capital and one ring around the Forbidden Palace, which was rushed in 530 AD in the southern part of my continent, down by the 1-tile lake with the four wheats.
It was my third MGL: the first one was used to rush Bach's, as the AI was close on my heels at that time, the second one formed an Army for the Heroic Epic, and by the time I got the third one, Kyoto had already collected ~110 shields for Shakespeare and it would have taken another two turns to get the MGL to Kyoto, so I decided to use it for the FP instead. The gamble payed off: my second core finally got off the ground and provided the necessary research to get to Theory of Gravity in time. And also I was involved in heavy fighting at that time and the HE was already completed, so I got another MGL shortly after and then was able to rush Newton's right when Shakespeare's was finished.
(In total I rushed 6 Wonders with MGLs: Bach's, Newton's, Universal Suffrage, SETI, Internet and Longevity. One benefit of playing on Deity: the AI produces lots and lots of units, so there are plenty of opportunities for battles and leader fishing...
And being militaristic helps with getting lots of elite promotions.)
Kyoto reached its full potential (size 20, Factory, Coal Plant and fully railed) in 950 AD. Bringing the second core to size 12 took a bit longer: roughly until 1200 AD. Here is a picture of the home continent in 1240 AD: