The Illustrated London News Etching From 1854. Interior Of An Officers Tent At Varna. Varna (Bulgarian: ?????, Pronounced [?varn?]) Is The Third Largest City In Bulgaria And The Largest City And Seaside Resort On The Bulgarian Black Sea Coast. Situated Strategically In The Gulf Of Varna, The City Has Been A Major Economic, Social And Cultural Centre For Almost Three Millennia. Varna, Historically Known As Odessos, Grew From A Thracian Seaside Settlement To A Major Seaport On The Black Sea.