Berolina was a named passenger train between Warsaw and Berlin via Frankfurt (Oder). Introduced in 1959, it went through a number of iterations, including a short period without a name. Part of the Interexpress network as IEx 242/243 from 1986, it became categorised as EuroCity trains 42 and 43 in 1992. The service was finally replaced by the Berlin-Warszawa-Express in 2002.