From Bædeker's Rhine - 1873:
Stat. Achern (*Krone, or Post, carr, to Allerheiligen 7–8 fl.;*Adler, moderate; beer at Huber's and the Engel), a thriving little town, lies at the mouth of the Kappeler Thal. The market-place is adorned with a monument to the Grand Duke Leopold (d. 1852). In the vicinity is the admirably conducted Lunatic Asylum of Illenau, accommodating 400 patients. Hence through the Kappeler Thal to Allerheiligen.