A turbine assembly, comprising: a stator vane support , comprising: an inner diameter surface opposite an outer diameter surface ; an anti-rotation lug defining a protrusion extending from the inner diameter surface , wherein the anti-rotation lug comprises a first surface opposite a second surface ; a first recess defining a first void on the inner diameter surface proximate the first surface of the anti-rotation lug , the first recess having a first inner surface ; and a second recess defining a second void on the inner diameter surface proximate the second surface of the anti-rotation lug , the second recess having a second inner surface , wherein at least one of the first inner surface of the first recess or the second inner surface of the second recess comprises a hemispherical shape relative to the inner diameter surface ; and a plurality of stator vanes each having an anti-rotation end configured to interface with the stator vane support , wherein each anti-rotation end comprises a first protrusion and a second protrusion extending radially from the anti-rotation end towards the vane support , wherein the first protrusion and the second protrusion define an anti-rotation void , wherein the anti-rotation lug is configured to interface with the anti-rotation end , and wherein the anti-rotation lug is configured to interface with the anti-rotation void to at least partially limit rotation of the stator vane relative to the vane support . a stator vane support , comprising: an inner diameter surface opposite an outer diameter surface ; an anti-rotation lug defining a protrusion extending from the inner diameter surface , wherein the anti-rotation lug comprises a first surface opposite a second surface ; a first recess defining a first void on the inner diameter surface proximate the first surface of the anti-rotation lug , the first recess having a first inner surface ; and a second recess defining a second void on the inner diameter surface proximate the second surface of the anti-rotation lug , the second recess having a second inner surface , wherein at least one of the first inner surface of the first recess or the second inner surface of the second recess comprises a hemispherical shape relative to the inner diameter surface ; and an inner diameter surface opposite an outer diameter surface ; an anti-rotation lug defining a protrusion extending from the inner diameter surface , wherein the anti-rotation lug comprises a first surface opposite a second surface ; a first recess defining a first void on the inner diameter surface proximate the first surface of the anti-rotation lug , the first recess having a first inner surface ; and a second recess defining a second void on the inner diameter surface proximate the second surface of the anti-rotation lug , the second recess having a second inner surface , wherein at least one of the first inner surface of the first recess or the second inner surface of the second recess comprises a hemispherical shape relative to the inner diameter surface ; and a plurality of stator vanes each having an anti-rotation end configured to interface with the stator vane support , wherein each anti-rotation end comprises a first protrusion and a second protrusion extending radially from the anti-rotation end towards the vane support , wherein the first protrusion and the second protrusion define an anti-rotation void , wherein the anti-rotation lug is configured to interface with the anti-rotation end , and wherein the anti-rotation lug is configured to interface with the anti-rotation void to at least partially limit rotation of the stator vane relative to the vane support . <EOS>