 The Fisher/Hoyt Central Library in the city's Golden Triangle opened in 1956 and was added to the National Register of Historic Places in 1990.As part of the dedication of the new library when it opened, Yale Library loaned a collection of books that included the 1455 Gutenberg Bible and 1640 Bay Psalm Book that are both rare and valuable artifacts.Throughout the 1950s and 1970s, Denver experienced an explosion of growth and quickly required more branches to be open to serve the new neighborhoods that branched out to the southeast and southwest.