Few people have seen the Missouri Botanical Garden’s Museum Building. It’s been closed to the public since 1980 because it’s in need of renovation. As part of its 150th anniversary celebration, the doors were opened for four hours. Watch this video by staff photographer Huy Mach

One hundred and fifty years ago, Henry Shaw, an Englishman with a keen sense of business and a passion for plants, transformed those fields, far from St. Louis’ bustling core, into what is now the oldest botanical gardens in the United States. At 79 acres, it is not the biggest; the New York Botanical Garden has 250 acres, the Chicago Botanic Garden 385.

But the Missouri Botanical Garden conducts more research here and abroad and boasts more volunteers and members than almost all of its peers.

Here we look at some milestones in the garden’s history.

— Diane Toroian Keaggy | St. Louis Post-Dispatch

Explore 3d photo panoramas of the Missouri Botanical garden.