After leaving school, Aba learned in yeshiva in Kapellen, Belgium, and then in Luzern, Switzerland, where studied under Rabbi Moshe Soloveitchik, with whom he maintained contact throughout the remainder of his life.
The area Kapellen lies in the Niederrhein (Lower Rhine) in the northwest part of German Federal State of Nordrhein-Westfalen.
Kapellen is a municipality in the district of Mürzzuschlag in Styria, Austria.
Its valley settlements are Hinternaßwald in the northeast, Altenberg an der Rax in the east, Kapellen and Neuberg an der Mürz in the south, Mürzsteg and Frein an der Mürz in the west.
About two years before the 1776 death of Pieter Cramer, the Dutch bachelor entomologist, Caspar Stoll also became involved in Cramer's great work "De Uitlandsche Kapellen", illustrated by Gerrit Wartenaar.
Cappellen F.C. is a Belgian football club from the town of Kapellen, near Antwerp.