The CAiSE 98 paper “Architecture and Quality in Data Warehouses” and its ex-panded journal version (Jarke et al. 1999) was the first to add a Zachman-like (Zachman 1987) explicit conceptual enterprise modeling perspective to the archi-tecture of data warehouses. Until then, data warehouses were just seen as collec-tions of – typically multidimensional and historized – materialized views on rela-tional tables, without consideration of modeling of the (business) conceptsunderlying their structure. The paper pointed out that this additional conceptualperspective was not just necessary for a truly semantic data integration but also aprerequisite for bringing the then very active data warehouse movement togetherwith another topic of quickly growing importance, that of data quality.