 However, as craftsmen saw their status sink with the introduction of industrialism, the proletarian class grew during the period.There also was an economic segregation in the city, with the present old town and the lower parts of Norrmalm being the wealthiest (more than 150% above average); and the suburbs (today part of central Stockholm) were poor (50% below average).Detailed regulations controlled what items should be produced and sold by the guilds, and what was permitted to be sold by retail sellers.