In 1880, in the
Theatre Square in front of the
Jabłonowski Palace (then the city hall), a stone pillar was erected surrounded by an iron railing with a sign indicating the geographical location and the height above sea level and the level of
Vistula. The Warsaw meridian passes through the top of the pillar and top of the clock tower of the Jabłonowski Palace, which served as point measurements. The plate on the sidewalk was constructed much later, in 1965. Four years after the construction of the column in Warsaw,
Greenwich Mean Time effectively became the international standard for time calculation around the world based on the
Prime meridian at
Greenwich in
London. The Meridian is featured in the 1965 film
Pingwin (
Penguin) starring
Zbigniew Cybulski. == References ==