Constantiam.net was created by PhantomCaptain (ign: PhantomCaptain & SpectreCaptain) around 14th of February 2016 on 1.8 version of Minecraft.

Up to late April 2016 server was empty most of the times with few travelers joining here and there for short time. Before our group (old 2b2t players/friends - mid and old fags) moved to this server in April, a small group of people, most likely knowing each other in real life were playing on there, but left the server before our time came.

This is how admin himself described that time period and that group to us after asking him in game:

In the meantime on 2b2t anarchy server (mid-April 2016) a group of friends that was basing at a base called La Rosa (which later was found in September 2016 on 2b2t) was getting sick and tired of all 2b2t drama, backdoors and much more, decided to leave the server and find a new place to call home.

Around 22th of April 2016 James_Rustles found constantiam while looking on 4chan. He logged in and told about newly found server two of his friends - Spartan512 and ftsqr. Two days later he informed other members of La Rosa about his find.

24th of April 2016. Most of La Rosa crew reunited on constantiam. Before we joined, server was empty most of the time. After we started playing, only we were online. I myself (mrx) joined at that day the first time too.

Source: _mrx16 on Reddit