Sir Giles Gilbert Scott was born in England in 1880 and lived there his entire life, until passing away in 1960 at the age of 79. By the age of 16, he was already involved with designing churches and college buildings and would continue do to so almost up until the time that he passed away. While he is credited with designing over 100 buildings and memorials, there is probably one specific accomplishment that many would recognize even if they had never been to England, or ever heard of his name.
To find this cache, you will need to find one of Sir Giles Gilbert Scott's designs. While this design is much more common in England, you can probably find these all over the world nowadays. Less functional than in the past, but I guess you can attribute that to progress. Cache is available 24/7 and some stealth may be required due to the number of muggles passing by.