The temple still exists today. It is called Datsan Gunzechoinei.
This is a video of the temple on Youtube:
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Photo 1: Agvan Dorjiev (1853 -1938)
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Photo 2: In 1909 A.Dorjiev set up the Building Committee which members were:
Academicians V.V. Radlov and S.F. Oldenburg
Prince E.E.Ukhtomsky
Professors of St.Petersburg University V.L.Kotvich, A.D.Rudnev, F.I.Stcherbatskiy
Artists N.K Roerich and V.P.Schneider
G.V. Baranovskii worked as an architect. His other famous works in St.Petersburg are the Eliseyev Trade House and the Geographical Society's building. He is also known as the author of a 7-volume encyclopaedia of architecture.
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Photo 3: The first act of worship was conducted on 21 February 1913, on the 300th Anniversary of the Romanov Dynasty when the Temple was still in its scaffolding.
In August 1915 the Temple was consecrated to "The Source of the Holy Teaching of the Buddha, Compassionate to All Beings". ("Gunzechoinei" for short).
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Photo 4: In 1919 the Temple was vandalized by the Red Army. In 1927 public worship in the Temple was resumed but for a short time only.
In 1935 -1937 lamas were arrested and the Buddhist community ceased to exist. In 1938 the Temple buildings were municipalized and then used as youth physical training centre. In 1941 - 1960 the Temple housed a radio station, and some laboratories of Zoology Institute later.
In 1990 the Temple was returned to the city's Buddhists.
Source: http://www.marhotin.ru/marhotin-datsan-eng/