I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "The major architectural undertakings were the buildings of abbeys and cathedrals. From about 900 CE onwards, the movements of both clerics and tradesmen carried architectural knowledge across Europe, resulting in the pan-European styles Romanesque and Gothic."? 

Between abbeys and tradesmen, which was an architectural undertaking?