"Sarajevo Rocked by Two Earthquakes" BalkanInsight.com 31 March 2009, which claims that: "The biggest earthquake in Bosnia and Herzegovina's history took place in 26 and 27 October 1969... That tremor measured 5.4 on the Richter scale and between 7 and 8 on the Mercalli scale."Gymnasium Banja Luka "History" claims that the 26 October 1969 earthquake had an intensity of 7.5 on the Mercalli intensity scale, whilst the 27 October 1969 earthquake had an intensity of 8.5 on the Mercalli scale.</ref> A large building called Titanik in the centre of the town was razed to the ground, and the area was later turned into a central public square. With contributions from all over Yugoslavia, Banja Luka was repaired and rebuilt. During this period a large Serb population moved to the city from the surrounding villages, and from more distant areas in Herzegovina.