[3] Founder of Rerberg dynasty came to Russia from Denmark in Petrine period, and since then first-born sons in the family always were named either Ivan or Fyodor.

Simultaneously Rerberg managed other projects of Klein's firm — Muir & Mirrielees department store (1907—1908), Moscow State University expansion, Devichye Pole clinics (1897—1900s), Miusskaya Square college (1903).

This building was styled in a mix of Victorian architecture and Art Nouveau; all subsequent work by Rerberg belonged to the school of Russian neoclassical revival.

[5] In 1925 Rerberg secured a contract to design Central Telegraph building in Tverskaya Street; the state clients initially opted for a public contest, but were dissatisfied with avant-garde entries and preferred to hire an old school professional.

Rerberg used reinforced concrete frame and moved all staircases outside of main building shell; this resulted in unusually spacious and well-lit open space offices, new to Moscow construction.

[6] Externally, the Telegraph mixed modernist structure of glass panes and granite-clad columns with classical symmetry and quality workmanship and attention to detail associated with Art Deco.