Eras

The six eras, their gates, palettes and paving ladders, and the level ceiling curve.

Founding · 1100Medieval · 1250Renaissance · 1450Industrial · 1650Modern · 1850Contemporary · 1970

The simulation loads in your browser (about 2 MB) and founds a valley of 128 paces. JavaScript is required.

era	nominal year	storeys	level ceiling	leaves at: people	treasury	literacy	built voxels	min years
Founding	1,100	1	22	48	120	0	1,200	12
Medieval	1,250	2	38	420	3,000	0.12	14,000	90
Renaissance	1,450	3	56	1,100	12,000	0.32	45,000	80
Industrial	1,650	4	74	3,000	40,000	0.6	120,000	80
Modern	1,850	9	90	7,000	120,000	0.85	280,000	70
Contemporary	1,970	22	100	—	—	—	—	—

An era is not bought and not timed. It arrives when the city's own numbers say it has, and each one widens the material vocabulary and raises the height ceiling without handing the city a building. What an age asks for eases off once the calendar is past its nominal year, so a slow city arrives late rather than never. The level ceiling climbs from 8 in 1100 to 100 in 2000: 1100: 8, 1250: 23, 1450: 43, 1650: 64, 1850: 84, 1970: 96, 2000: 100.