Late 19th/ early 20th century was a period of active usage of low-temperature hydraulic binders, e.g., romancement, for the construction of buildings. Dolomitic romancement was characteristic to Latvia in contrast to rest of Europe, where calcitic romancement was applied. An investigation have been done with the aim to synthesize a binder from local clay and dolomite compatible with historical dolomitic romancement. The results of chemical and XRD phase analyses have approved that Devonian as well as Quaternary period clay in mixture with dolomite can form a binder which closely conforms with historical ones. Obtained compositions can be considered as perspective for restoration needs.