Gunman Man Haron Monis takes 18 hostages inside a café in Martin Place for 16 hours in Sydney. Monis and two hostages are killed when police raid the café the following morning.

Man Haron Monis was an Iranian-born refugee and Australian citizen who took hostages in a siege at the Lindt Chocolate Café at Martin Place, Sydney on 15 December 2014, lasting for 16 hours, until the early hours of the following morning. The siege resulted in the death of Monis and two hostages.

The Lindt Café siege was a terrorist attack that occurred on 15–16 December 2014 when a lone gunman, Man Haron Monis, held ten customers and eight employees of a Lindt Chocolate Café hostage in the APA Building in Martin Place, Sydney, Australia.

Martin Place is a pedestrian mall in the Sydney central business district, New South Wales, Australia. Martin Place has been described as the "civic heart" of Sydney. As home to the Reserve Bank of Australia, the Commonwealth Bank, Macquarie Bank, Westpac and other corporations, it is also a centre of business and finance. In this way, Martin Place is comparable to other major business districts such as Wall Street and the Square Mile. The Sydney GPO is also located on Martin Place.