Any one in Dallas, Texas...old building information.?

I heard somewhere that Medical City Dallas, use to be a hotel. I can't find any of that info on-line, does anyone know where to look or know if it's true.Any one in Dallas, Texas...old building information.?
7777 Forest Lane was built in the mid/late 70's specifically as Medical City Hospital.



I was a paramedic in Dallas at the time and remember when it opened... it was built to be competition against Presby and Baylor....Any one in Dallas, Texas...old building information.?
call the dallas historical society

p411