The central feature of Heroes' Square, as well as a landmark of Budapest, is the Millennium Memorial (, also translated Millennium Monument or Millennial Monument). Construction began in 1896 to commemorate the thousandth anniversary of the Hungarian conquest of the Carpathian Basin and the foundation of the Hungarian state in 896, and was part of a much larger construction project which also included the expansion and refurbishing of Andrássy Avenue and the construction of the first metro line in Budapest (). Construction was mostly completed in 1900, which was when the square received its name. The four allegoric sculptures were added in 1906, the monument as a whole basically looked like it does today (except for the kings' statues), complete with the surrounding museums on either side, and it was inaugurated still in the same year, 1906.