Gain more culture point

I have made a study on the relation between the resources used to construct a building and the culture point.

Let me explain about the statistics, the columns:

• Acc Res is accumulated resources to construct a building of the specified level (i.e. sum of all previous levels)
• CP is the culture point at that level
• Acc Res/CP is the resources needed to gain 1 culture point

I just show the buildings at level 5, 10, 15, 20, to simplify the list. By sorting the Acc Res/CP, we can see that at level 5, Main building is the most efficient to gain culture point, and then Marketplace and so on, you can find the order in the list ^^

	Buildings	Level	Acc Res	CP	Acc Res/CP
1	main building	5	1650	5	330
2	marketplace	5	2955	7	422
3	academy	5	4425	10	443
4	embassy	5	4700	10	470
5	cranny	5	1130	2	565
6	main building	10	7340	12	612
7	marketplace	10	13120	19	691
8	academy	10	19675	25	787
9	embassy	10	20835	25	833
10	cranny	10	5005	6	834
11	main building	15	26855	31	866
12	marketplace	15	48050	46	1045
13	academy	15	72055	62	1162
14	granary	5	2355	2	1178
15	main building	20	93915	77	1220
16	embassy	15	76295	62	1231
17	stable	5	6270	5	1254
18	marketplace	20	168030	115	1461
19	blacksmith	5	7660	5	1532
20	armoury	5	7665	5	1533
21	academy	20	252040	153	1647
22	palace	5	20450	12	1704
23	earth wall	5	3475	2	1738
24	granary	10	10435	6	1739
25	city wall	5	3480	2	1740
26	palisade	5	3480	2	1740
27	embassy	20	266870	153	1744
28	trapper	5	3500	2	1750
29	warehouse	5	3650	2	1825
30	rally point	5	3735	2	1868

So, the best bet for culture-point-first village, you should have Main Building, Marketplace, Academy and Embassy. For Cranny, i think it depends, through it is very cost efficient, you only get 6 culture point for level 10 Cranny ^^"