In the 1940s-1960s, Spanish publishing house Biblioteca de Autores Cristianos (BAC) published one of the most celebrated annotated editions of the Summa Theologica, in 16 bilingual volumes (Latin/Spanish), with comments by Dominican friars under the direction of Bishop Francisco Barbado Viejo, O.P., who helped found BAC following the Civil War. It is considered by many to provide the very best and the most profound and didactic introductions and notes on the Summa in any modern language.
It has come to our attention that, after a few decades publishing only its post-Conciliar very inferior 5-volume version (also available online here), BAC has since last year begun the republication of a facsimile version (3rd. edition) of the 16-volume classic - first providing the 1st (I, q.1-26) and 2nd (I, q.27-74) volumes of the series.
Congratulations to BAC for this magnificent Thomist gift to the world.