The Riga Civil Aviation Engineers Institute (RCAEI) (Latvian: Rīgas Civilās Aviācijas Inženieru Institūts (RCAII), Russian: Рижский институт инженеров гражданской авиации (РКИИГА until 1991), Рижский авиационный университет (РАУ until 1999)) was an engineering university in the USSR and Latvia. It was founded in 1919 and closed in 1999. Thousands of students graduated from the institute from over 93 countries. The institute had several different names during its history as well as moving from Kiev to Moscow to Petrograd to Riga. Riga Aviation University closed in 1999, with its programmes moved to Riga Technical University.