The func­tion of a stair­ca­se is a prac­ti­cal and at the same time a deco­ra­ti­ve one. Whe­re crea­ti­vi­ty is con­cer­ned, the limits of indi­vi­dua­lism seem to be rea­ched — not so in the opi­ni­on of Dutch­man Frans Son­nem­ans. His company’s spe­cial­ty are stair­ca­ses made from extra­va­gant mate­ri­als and varia­ti­ons regar­ding the type, style and design of a staircase.