The square, renamed in 1927 in honor of Lajos Kossuth, was previously known by several names including; Országház tér , Tömő tér or Stadt Schopper Platz in German . This name recalls how the low-lying territory flanking the river, then outside the town of Pest, was filled with rubbish to raise the level of the ground. The first recorded name was Stadtischer Auswind Platz in 1820. In the second half of the 19th century, great public buildings were erected on the square and it became the symbolic centre of the Hungarian state. The Hungarian Parliament Building is located on the square. Facing the parliament building is the Museum of Ethnography and the Ministry of Agriculture. After World War II, a temporary bridge across the Danube, Kossuth híd, was built between Lajos Kossuth Square and Batthyány Square, and functioned from 1946 until 1960. It was dismantled when most of the permanent :Category:Bridges in Budapest|bridges were re-built. It is marked with memorial stones on the Pest and the Buda sides. In its place, a pontoon bridge was built in 1973 and in 2003, for a few days around national holidays. From 17 September 2006 Kossuth Square was the scene of the great anti-government demonstrations against Prime MinisterFerenc Gyurcsány triggered by the release of Gyurcsány's speech in which he confessed that he had lied to win the 2006 elections. Until 23 October the square was continuously occupied by the demonstrators. After the 23 October riots the police closed off the square with cordons. The long closure of square caused controversy. The cordons were removed only on 19 March 2007. The damaged park was subsequently restored and the square was given back to the public. The square was closed again in 2012 by a decision of the Parliament in order to restore its original, pre-1944 view. The square was reopened in 2014 as a no-traffic zone with a sustainable park, updated tracks for tram No. 2, an underground parking garage, sculptures, and a memorial to the victims of the Kossuth Tér massacre on 25 October 1956.
A memorial to the victims of the 25October 1956 massacre at Kossuth tér was created in the southern ventilation tunnel as part of the 2012-2014 reconstruction of the square. The memorial remembers the unarmed victims who gathered on this "Bloody Thursday" as part of the 1956 Hungarian Revolution with videos, photos, candles, and memorabilia of the era. Little information is certain about this massacre, from who fired the first shot and why to how the protesters were led to gather in that location on that day to the death toll of the event. Sources cite as few as 22 shot dead up to as many as 1000. British officials cite the number as being between 300 and 800. The memorial asks anyone with information on the massacre to report it to officials to help complete the story.