What makes Citadel by Ne Obliviscaris notable?

The album received widespread critical acclaim, solidifying Ne Obliviscaris as a significant force in progressive metal. Its ambitious structure and fusion of genres influenced a wave of subsequent bands aiming to blend technical prowess with emotional depth, positioning them as leaders of the genre's modern resurgence. When 'Citadel' was released in 2014, Ne Obliviscaris was building on the momentum from their debut album, 'Portal of I'. This sophomore effort showcased their unique sound, incorporating classical influences and complex arrangements that had begun to define their identity in the progressive metal scene.