This document summarizes the AddressingHistory project, which created an online crowdsourcing tool combining digitized historical Scottish Post Office Directories (PODs) with historical maps. The project had two phases: the first created the initial tool using three POD volumes from 1784-1805, 1865, and 1905-1906. The second phase expanded coverage to additional years and locations, improved parsing of names and occupations, and added new search and visualization features. Lessons learned included the need for ongoing refinement, sustainability planning, and engagement of relevant communities.