The museum itself was founded in 1921. Joseph Rosensteel designed and laid out the map and later died on October 18. 1964. The first map opened in 1939 and was discontinued in 1963. This map was opened in April of 1963. More than 61 million people have viewed the 70-year-old map.

Number of Seats
North	136
South	148
East	148
West	122
Total	554

Number of Switches
Toggles	250
Dials	3
Total	253

Number of Lights
Row A	93
Row B	82
Row C	92
Row D	108
Row E	119
Dial 1	15
Dial 2	83
Dial 3	35
Total	627