This week's Picture news in assembly prompted a lot of discussion around what makes buildings special.
One of Sweden's biggest wooden structures, a church in Kiruna, is being moved 5km due to the ground becoming unstable.
Mr Hornsey then talked about other famous structures being moved such as Marble Arch and London Bridge.
One particular type of special building which can't be moved but can sometimes be replaced are football stadia (linking in with Saturday's England match) and this was discussed too, nicely coinciding with the 25th anniversary of the closure of the previous Wembley stadium.
So, for all those football fans out there, can you name 5 football or sports' stadia which have been rebuilt elsewhere? Here's one for starters....Everton, which was discussed in assembly, and whose new stadium has actually been built over a dock on the river Mersey.