The Frères Mayer, or Mayer Brothers, are not widely known as individual artists and therefore, a detailed biography including their birth and death years may not be readily available or might refer to a different set of individuals or entities known by that name. If they were a pair of artists, they might have collaborated on projects, possibly during the 19th or 20th centuries, as 'Frères' suggests a French origin or influence and is a term used to denote 'brothers' in French.
Without specific historical records, the work of the Frères Mayer may encompass a variety of artistic endeavors, including painting, sculpture, or even photography, given the advent of the latter in the 19th century. If they were indeed active during this period, they might have been involved in the artistic movements of their time, such as Romanticism, Realism, Impressionism, or the later Modernist movements.
It is also possible that the name 'Frères Mayer' refers to a company or a workshop rather than individual artists. This was not uncommon in European artistic production, where family names often became associated with a particular craft or artistic enterprise. In such a case, the 'Frères Mayer' might have been known for a specific style or type of artwork, or may have contributed to larger projects in collaboration with other artists or patrons.
Without more specific information or context, it is challenging to provide a detailed biography for the Frères Mayer. They do not appear to be among the most well-documented or studied figures in art history, and as such, their contributions and significance might be more obscure or require specialized research within a particular niche of art historical scholarship.