This image shows the interior of the Lincoln Park Conservatory during the annual flower show featuring plants for Easter and Spring.
The description states:
EASTER AND SPRING FLOWER SHOW
A view of the Easter and Spring Flower Show in Lincoln Park Conservatory — one of the major flower shows of the Chicago Park District presented each year in Garfield and Lincoln Parks.
–This show was first held in 1847 and is now held at Chicago’s Navy Pier. This card likely dates from the 1950s.