{"nrhp_refnum":"87000819","name":"Adler Planetarium","other_names":["Adler Planetarium and Astronomical Museum"],"category":"building","location":{"address":"1300 S. Lake Shore Dr.","address_restricted":false,"city":"Chicago","county":"Cook County","state":"IL","lat":41.86618547100005,"lon":-87.60672594399995,"geom_source":"nps_gis"},"listed_date":"1987-02-27","is_nhl":true,"nhl_designated_date":"1987-02-27","areas_of_significance":["Entertainment/Recreation"],"significance_levels":["national"],"summary":{"what_it_is":"A planetarium and astronomical museum on the northern tip of Northerly Island on the Chicago lakefront, designed by Ernest Grunsfeld, Jr. and built in 1929-30. It was the first planetarium in the Western Hemisphere.","why_significant":"The building was the first planetarium in the Western Hemisphere, given to Chicago by Max Adler. Together with the Field Museum, Shedd Aquarium and Soldier Field, it forms a cultural complex tied to the 1933-34 Century of Progress Exposition. Grunsfeld's design won an American Institute of Architects gold medal in 1930, and Carl Condit praised it as a 'classic in the modern idiom'.","narrative":"Perched on the northern tip of Northerly Island, a landfill peninsula in Lake Michigan, this planetarium and astronomical museum opened in May 1930 as the first of its kind in the Western Hemisphere. Architect Ernest Grunsfeld, Jr. designed a granite-clad building of three nested 12-sided rings rising to a copper-covered dome; the twelve sides recall the months and zodiac signs. Bronze zodiac plaques by Alfonso Ianelli decorate the corners. Max Adler, a retired Sears, Roebuck executive, funded the building, the projector and a large collection of antique scientific instruments. The planetarium joins the Field Museum and Shedd Aquarium in a lakefront cultural group, and these buildings survive as key remnants of the 1933-34 Century of Progress Exposition. Grunsfeld received an American Institute of Architects gold medal in 1930. A 1973 underground addition more than doubled the floor space without altering the setting, and over 22 million people have visited.","period_of_significance":"1929-30","architect_builder":"Ernest Grunsfeld, Jr. (Planetarium)","architectural_style":null,"criteria":[],"status_note":"Described as in excellent condition though altered; a 1973 underground addition and a 1977 observatory were added. The building remains in use as a museum and planetarium.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:55:35.888374-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/78/8915/28891578/content/electronic-records/rg-079/NPS_IL/87000819_NHL.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/87000819/3c0fb43d33-800.webp","url_1600":"https://nationalhistoricalregister.com/media/87000819/3c0fb43d33-1600.webp","licence":"CC BY-SA 3.0","author":"Adler Planetarium","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Adler_external_1.jpg\" rel=\"noopener\">Adler Planetarium</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\" rel=\"license noopener\">CC BY-SA 3.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Adler_external_1.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/28891578","wikipedia":"https://en.wikipedia.org/wiki/Adler_Planetarium","wikidata":"https://www.wikidata.org/wiki/Q358052"},"indexable":true,"url":"https://nationalhistoricalregister.com/illinois/cook-county/adler-planetarium-87000819/"}