St Martin-in-the-Field Church was constructed in the 1700s, but the site it was built upon has housed a place of worship since the middle ages. The church itself a magnificent example of neoclassical architecture. However recently it was given an artistic twist. Walk around the cathedral and place close attention to the windows. One of these windows, designed by an Iranian artist was installed in 2008 and will make you feel like you’re hallucinating.