As global trade networks were expanding, Europeans started taking interest in Yemen. In 1761 a research expedition set out from Denmark to Arabia. Due to hardships only one person, Carsten Niebuhr (1733-1815), survived. This map was published alongside his book of travels, an immediate bestseller that was translated shortly after its publication into Dutch, French, and English. It remains an invaluable source of information and a testament to connections be-tween Yemen and different regions in the time. The map depicts the territory that Imams including Yaḥyā Ḥamīd al-Dīn claimed.
Carsten Niebuhr, Tobias Conrad Lotter and Gustav Conrad Lotter, Terrae Yemen maxima Pars. seu Imperii Imami, Principatus Kaukebân, nec non ditionem Haschid U Bekîl, Nehhm, Chaulân, Abu Arîsch et Aden, 1774 (COLLBN Port 174 N 35)