devolviesen
Imperfecto de subjuntivo para el sujetoellos/ellas/ustedesdel verbodevolver.

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Varias conferencias internacionales congregando a diversos pueblos o naciones sudamericanas emitieron votos o reivindicaciones para que la espiritualidad indígena fuese respetada y que se devolviesen los objetos y el patrimonio religioso robado a sus dueños legítimos.
Various international conferences which gathered various peoples from various nations claimed the respect of indigenous spirituality. They also claimed that the religious heritage and objects be given back to their legitimate owners. They asserted that the religious missions had imposed foreign patterns to dominated indigenous societies.
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