Complex sentence: In January 2011, the Museum reopened its upper galleries after an extensive renovation, to showcase "The MIT 150 Exhibition" in commemoration of the 150th anniversary of MIT's founding charter on April 10,1861.
Split into simpler sentences: In January 2011, the Museum reopened its upper galleries after an extensive renovation. The first exhibit in the renovated space was "The MIT 150 Exhibition" in commemoration of the 150th anniversary of MIT's founding charter on April 10,1861.