Stable

All levels ?Romans

Lvl						?	CP?	Training time?
1	260	140	220	100	0:00:22	+5 (5)	2	100%
2	335	180	280	130	0:00:29	+3 (8)	3	90% -10%
3	425	230	360	165	0:00:36	+3 (11)	3	81% -9%
4	545	295	460	210	0:00:45	+3 (14)	4	72.9% -8.1%
5	700	375	590	270	0:00:55	+3 (17)	5	65.6% -7.3%
6	895	480	755	345	0:01:07	+3 (20)	6	59% -6.6%
7	1,145	615	970	440	0:01:21	+3 (23)	7	53.1% -5.9%
8	1,465	790	1,240	565	0:01:36	+3 (26)	9	47.8% -5.3%
9	1,875	1,010	1,585	720	0:01:55	+3 (29)	10	43% -4.8%
10	2,400	1,290	2,030	920	0:02:16	+3 (32)	12	38.7% -4.3%
11	3,070	1,655	2,595	1,180	0:02:41	+4 (36)	15	34.9% -3.8%
12	3,930	2,115	3,325	1,510	0:03:10	+4 (40)	18	31.4% -3.5%
13	5,030	2,710	4,255	1,935	0:03:43	+4 (44)	21	28.2% -3.2%
14	6,435	3,465	5,445	2,475	0:04:22	+4 (48)	26	25.4% -2.8%
15	8,240	4,435	6,970	3,170	0:05:07	+4 (52)	31	22.9% -2.5%
16	10,545	5,680	8,925	4,055	0:05:59	+4 (56)	37	20.6% -2.3%
17	13,500	7,270	11,425	5,190	0:06:59	+4 (60)	44	18.5% -2.1%
18	17,280	9,305	14,620	6,645	0:08:09	+4 (64)	53	16.7% -1.8%
19	22,120	11,910	18,715	8,505	0:09:31	+4 (68)	64	15% -1.7%
20	28,310	15,245	23,955	10,890	0:11:05	+4 (72)	77	13.5% -1.5%

Build times with a level 1 Main Building on this x100 world (Gold boosts and artifacts shorten them further). Population in brackets is the building's total at that level.