Johannes Tielius (Jan Tilius), Dutch painter. He was on of the last of the 'fine' painters to emulate Gerrit Dou's delicate, porcelain-like brushwork. He was born in s-Hertogenbosch and worked in the 1690s in The Hague. His teacher may have been Pieter van Slingeland. He was probably also aware of the work of Adriaen van der Werff and Willem van Mieris. Tielius spent the last years of his life in London. //