's-Hertogenbosch 1871 - 1938 's-Hertogenbosch. The eldest son of Petrus Marinus. Piet Slager was a gifted painter of landscapes and, like his father, an exceptionally talented portrait-painter. His work shows the early influence of impressionism as can be seen from his cityscapes and landscapes.
Piet Slager was connected to the "Royal School" at 's-Hertogenbosch for almost forty years. He gave lessons to Noud Paashuis, Marius de Leeuw, Charles Grips and Jan van den Thillart among others. His sisters Jeannette and Corry and his wife Suze Velsen also got lessons from him.