Architect:
Vilhelm Helander, Tytti Valto

Client, Construction Management:
Governing Board of Suomenlinna

Structural Design:
Innostructura Engineers

Electrical and Telecommunications Design:
J.W. Majurinen Engineers

Heating and Ventilation Design:
Timo P. Penttilä Engineers

B1 Kitchen Design and Food Service Design:
Rita Pulli Kitchen Engineers

The wings of Crownwork Ehrensvärd were built with mansard roofs in the 1770s, but converted into gabled roofs after the Crimean War bombardments of 1855. Wing C 28 has vaulted ceilings, and was renovated for meeting facilities as well as flats. Wing C 40 has been converted into the Suomenlinna administrative offices.

Traverse Adlerfelt B1 was built in 1770 as a defense fortification for the galley dock. Today it houses the Cafe Chapman, with offices above. The shed B2 has been renovated for summer tourist use.