Synchronic research on the Nubian languages began in the last decades of the nineteenth century, first focusing on the Nile Nubian languages Nobiin and Kenzi-Dongolawi. Several well-known Africanists have occupied themselves with Nubian, most notably Lepsius (1880), Reinisch (1879) and Meinhof (1918); other early Nubian scholars include Almkvist and Schäfer. Additionally, important comparative work on the Nubian languages has been carried out by Thelwall, Marianne Bechhaus-Gerst in the second half of the twentieth century and Claude Rilly and George Starostin in the twenty-first.