No. It rises based on era. 200 until the end of the Medieval, then 300 in Renaissance, 400 in the Industrial, 600 in the Modern, 800 in the Atomic, and 1000 in the Information Era. Multiply by gamespeed (0.66 Quick, 1 Standard, 1.5 Epic, 3 Marathon) to get cost. Pagodas, Mosques, Cathedrals...