The Henry Moore Institute in Leeds will close next month for renovation works expected to last until next summer.
The refurbishment will include a new dedicated public engagement workshop, an improved welcome area and Research Library entrance, refreshed activity space and new toilets and baby changing facilities.
Meanwhile, solar panels will be installed on the roof.
Laurence Sillars, Head of the Henry Moore Institute, said: "These alterations will bring a significant step-change to how, and where, our programmes are experienced, retaining our world-renowned research facilities while ensuring that young people — our potential great creative thinkers of the future — feel at home.
"We’re looking forward to reopening our doors next summer with revitalised spaces that better serve our visitors and the vibrant communities of Leeds and beyond.”
The institute will close to the public from 27 November.