Markus was born in Halfweg in the Netherlands. She is known for her paintings of woman in drapings. Markus is an autodidact with a realistic style. Her first exposition was in 1981 and her own atelier and exposition space was opened in 1995. In 2003, a book with a collection of her paintings was released because of her 25-year anniversary as a painter.
Markus has a distinctive clothing style.
On November 6, 2009, it was announced that Markus was selected as Dutch artist of the year.
Head office of ING Group as painted by Ans Markus (1987) in a fantasy landscape