Urban development occurred at a very fast pace: overall, the urban population had doubled by 1850. Population estimates for Bucharest, the capital of Wallachia, were about 70,000 inhabitants in 1831, 60,000 in 1851, and about 120,000 in 1859. For Iași, the capital of Moldavia, the estimates were 60,000 inhabitants for 1831, 70,000 for 1851, and about 65,000 for 1859.
Urban expansion was rapid: by 1850, the urban population had doubled. Bucharest's population grew from approximately 70,000 in 1831 to around 120,000 in 1859. Iași's population also increased significantly, rising from about 60,000 in 1831 to roughly 65,000 by 1859.