Eise Eisinga was here

The Eisinga Planetarium, built by Eise Eisinga between 1774 and 1781, faces challenges to its authenticity due to alterations around 1900. While the ceiling and bedsteewand remain authentic, repairs and modifications—such as installing a stove and replacing windows for ventilation—have reduced the instrument's original state. Despite this, the Planetarium retains significant historical value and remains eligible for UNESCO World Heritage status. The study, based on government architect Jacobus van Lokhorst's reports, highlights the tension between preservation and necessary alterations, raising concerns about future authenticity as visitor numbers increase.

Vreeling, S. (2022). Eise Eisinga was here. Bulletin KNOB, 20–33. https://doi.org/10.48003/knob.121.2022.2.745