In 1818, prior to his ascension on the throne, Nicholas I visited the New Jerusalem and was 'deeply moved' by it, such that he ordered its restoration.
During WW2, in 1941, the German army (the 2nd SS division) ransacked the New Jerusalem Monastery. Before their retreat they blew up its unique great belfry; the towers were demolished; the vaults of the cathedral collapsed and buried its famous iconostasis, among other treasures. In 1959, the museum was re-opened to the public, although the bell-tower has never been rebuilt, while the interior of the cathedral is still bare.
Recently, in 2009, the Russian president at the time, Medvedev, issued a presidential order for the restoration and renovation of the monastery (estimated to cost more than 13 billion roubles!)