Theodore C. Heuck (1830–1877) was an architect, a merchant, and a painter. He designed The Queen's Medical Center, the Royal Mausoleum of Hawaii in 1865, and ʻIolani Barracks in 1871.

The Queen's Medical Center, originally named and still commonly referred to as Queen's Hospital, is the largest private non-profit hospital in Honolulu, Hawaii. The institution was founded in 1859 by Queen Emma and King Kamehameha IV, and is located in Downtown Honolulu.