The pubwiki site lists the pubs which have existed over the past two hundred years, or so.
The pub history sites record detailed research of people, buildings and streets from diverse sources, including Chaucer, Shakespeare, Pepys and Dickens, pub tokens, masonic records of meetings, Sun Fire insurance records, early maps and street directories, licensing petty sessions records, census detail, births, christenings, marriages, deaths and wills. There are also a significant number of images of the buildings, business cards and other related material.
The Roman tavernae started the trend, followed by beer being safer to drink than water. If you see Old or Ye Olde in the name of a pub, it is almost certainly brand new, probably an old bank, or post office.
The research has been built over a number of years by a team of experts; and continues to evolve. The best research is for London pubs, taverns and beer houses over the past two hundred years, but nearly all of the south of the UK has entries; and much of the entirety of the UK is listed in one format or another.
Many of the more astute licensed victuallers were involved in the Licensed Victuallers Association. This association was an insurance to protect families in times of hardship. We now have some form of insurance for those in hard times, but this has not always been available. The sensible licensee or publican would have bought an insurance in some format. The licensed victuallers association offered this, to their own family, or members of an extended family.
I have a massive interest in history of any old London building, whether it be a pub, a church, or any other landmark that is identifiable in history. I do love London, and its history, and do want to understand where, and how, London evolved through time, and what originally existed before the masses of modern architecture was built. My recent site on London history continues to build as I try and make sense of some of this.