 Thank you, Electra in Cambodia, Kim in Canada and Catherine in London. It's clear that when it comes to buildings, different things are important to different people. For Electra, it's partly orderliness. Catherine, it's a sense of connection to the past. And for Kim, impressive workmanship. We need to recognise that not everyone's experience is the same. This is neuroscientist Professor Ed Vessel from City College, New York. He studies how our brains are affected by what we see.