Below is a list of philosophical and theological writings from the High Middle Ages!
Anslem of Canterbury
Monologion (c. 1076 CE)
Proslogion (c. 1077 - 1078 CE)
Cur Deus Homo (Why God Became Man) (c. 1094 - 1098 CE)
Peter Abelard
Sic et Non (Yes and No) (c. 1120 - 1123 CE)
Ethica (c. 1138 - 1140 CE)
Peter Lombard
Libri Quattuor Sententiarum (Four Books of Sentences) (c. 1155 - 1158 CE)
Albertus Magnus
Summa Theologiae (c. 1245 - 1252 CE)
Commentaries on Aristotle (c. 1240s - 1270s CE)
Bonaventure
Commentary on the Sentences (c. 1250 - 1253 CE)
Itinerarium (c. 1259 CE)
St. Thomas Aquinas
Summa Contra Gentiles (c. 1259 - 1265 CE)
Commentaries on Aristotle (c. 1260 - 1272 CE)
Summa Theologica (c. 1265 - 1274 CE)
Duns Scotus
Ordinatio (c. 1300 - 1304 CE)
Quaestiones Subtilissimae (c. 1300s CE)
William of Ockham
Summa Logicae (c. 1323 CE)
Ordinatio (c. 1317 - 1322 CE)
Dialogus (c. 1332 - 1347 CE)