Here's a lovely penthouse in Stockholm, Sweden that manages to blend various of interior design tastes into one home without looking confused:

The three bedroom apartment blends traditional elements with modern decor. High ceilings and generously-sized windows provide a feeling of openness and space. The living room houses traditional fireplace, inclined walls, decorative knick-knacks and wooden furniture. There's an open kitchen located just beside and a staircase leading to a small bedroom. The master bedroom features a large bed,  six built-in closets for storage and opens towards a lovely terrace of about 6,5 square meters.