 They had to prove their skills in the trade, but no length of schooling was stipulated.The period saw a new bourgeoisie climb the ranks — the so-called "Skeppsbroadeln" — which made a fortune on the emerging industry and had palaces built on the prestigious quay Skeppsbron and slightly more modest estates on the still rural ridges — many of which has survived in their original states.The period also saw several scientific novelties