28-01-2025 - Color research exterior De Klinze Aldtsjerk

05-10-2024 - Post-report Epithaaf Van Haren

02-10-2024 - Colour research and -design Jelsum

03-07-2024 - Additional research Chancellery

18-06-2024 - Color research Lifeboat shed

02-04-2024 - Colour research Oranjestein

08-03-2024 - Color hist. research Chancellery

01-03-2024 - Research water damage ceiling Kimswerd

21-12-2023 - Color research at Villa Barmerhoek

19-07-2023 - Colour research in Harstastate

03-06-2022 - Post-report St. Joseph's Cathedral Groningen

19-01-2022 - Stiens Notarishuis - extensive report 160 pages

12-03-2020 - Colour research Leeuwarden

12-10-2017 - Conservation and research mourning signs

12-09-2017 - Church Hindeloopen - research, colour advice

12-08-2017 - Church in Schettens, Friesland - research and conservation

12-05-2017 - Color research for a church in Driesum (Friesland)

12-10-2016 - Research Hegebeintum

12-10-2015 - Church in Menaldum - colour research

01-09-2014 - Restoration/preservation memorials, epitaph

12-10-2010 - Moarning signs in Ee (Friesland) conservation