Greetings all, 

In the news - low water levels on the Danube in Bulgaria have exposed parts of the famous bridge of Emperor Constantine I : 

 

https://www.ekathimerini.com/culture/1311793/low-danube-water-levels-in-bulgaria-expose-roman-era-bridge/

 

It was inaugurated on July 5th in 328 AD, and was the longest bridge in antiquity, spanning a little over 2 km (1.2 miles.)  It is fascinating that part of it still remains!

-Marcus Cassius Julianus