Complex sentence: The current director is the artist and art historian Saskia Zwiers, who has conducted research into the paintings and artists of the collection and who has built a period-style dollhouse in the same style of Dutch show-dollhouses of the 18th century.
Split into simpler sentences: The current director is the artist and art historian Saskia Zwiers, who has conducted research into the paintings and artists of the collection. She has built a period-style dollhouse in the style of Dutch show-dollhouses of the 18th century.