TERRE HAUTE (WIBQ) - Terre Haute's Union Hospital is 118 year old and what was its present? An Indiana Historic Marker! CEO David Doer said the community commemorated the day. What used to be called the Terre Haute Sanitarium, and now sits exactly where the "sanitarium" sat, is called Terre Haute Union Hospital East and opened early this year. That's the newest building in the historic family of hospitals.