There are TWO displays, commonly mistaken for each other that appear to have a Thunderbolt-2 interface.
The Apple Thunderbolt Display 27-in A1407 is a 2560 by 1440 display that has a lead in cord with ONLY TWO connectors -- Thunderbolt-2 and MagSafe.
This display works great with the Apple ThunderBolt-3 <-> Thunderbolt-2 adapter, US$50.
In addition to the built-in Thunderbolt cable, the display also has a built-in MagSafe-2 connector that charges an older Thunderbolt-equipped MacBook Air or MacBook Pro.
from:
https://everymac.com/monitors/apple/thunderbolt/specs/apple-thunderbolt-display-27-inch-specs.html
--------
Cinema display LED 27-in A1316 from 2011 is a 2560 by 1440 display that features lead-in cord with three connectors -- Mini DisplayPort, MagSafe-2 and a USB-A pigtail. It does NOT work with the Thunderbolt adapter, but works fine with a USB-C to miniDisplayPort adapter.
It includes three USB 2.0 ports and a convenient single cable with THREE connectors (Mini DisplayPort, MagSafe-2, and USB 2.0), a built-in iSight camera with a mic and a 2.1 speaker system.
This display works great with a USB-C to MINI-DisplayPort adapter.
from:
https://everymac.com/monitors/apple/studio_cinema/specs/apple-led-cinema-display-27-inch-specs.html