Glass furnace

The Glass Furnace is a civil production building that produces Glass and is only available to build at The Fire Peaks. It can only be unlocked after upgrading the native village at the upper left of the castle to Level 1. Similar to other production-type buildings such as the Charcoal Burner and the Olive Grove, the number of structures which can produce at its maximum rate is limited to 2 and it can be demolished when you don't need it.

Statistics

Image	Building level	Level required	Cost	Experience points	Glass production
	1	47	16,449 Wood & 22,450 Stone	20	13
	2	47	22,311 Wood & 25,193 Stone	22	18
	3	49	28,112 Wood & 27,937 Stone	24	23
	4	52	32,534 Wood & 33,681 Stone	27	28
	5	56	40,009 Wood & 39,425 Stone	29	33
	6	60	45,480 Wood & 45,169 Stone	30	38
	7	64	52,118 Wood & 50,913 Stone	33	43
	8	66	58,111 Wood & 56,657 Stone	34	48
	9	68	64,529 Wood & 62,401 Stone	36	53
	10	69	70,541 Wood & 74,150 Stone	59	58
	11	70 / Legendary Level 1	79,880 Wood & 80,475 Stone	62	63