Dmitri Mendeleev was a Russian chemist. He is credited as being the primary creator of the first version of the periodic table of elements. Unlike other contributors to the table, Mendeleev predicted the properties of elements yet to be discovered.
There is a legend about how he has discovered this table. According to this legend he was trying to figure out the table for many weeks but couldn't get all the elements in one table. So he was very tired and exhausted so got a little nap, and during this nap he have got the dream. In this dream he has clearly seen the periodic table of elements in three dimensions. Everything was structured and brilliantly looking. Not only the known and already discovered elements, which have already got their names, were on this table, but the previously unknown elements which didn't have the names and were not discovered for that time, they were discovered only years later. All he had to do is to wake up and write everything down. So he woke up and the table was ready.
Here is a photosession of the house where he had got this prophetic vision. After the Communist's takeover in Russia all the private property was confiscated by the state, but state has no funds to support this property. So even these days many of houses of well known pre-Communist Era people stay abandoned and almost destroyed.
And by the way, in Russia people believe that Mendeleev was inventor of vodka.