- Mellini, Piero1
- Metalli, Giuliano1
- Methodology1
- Mevleviyeh1
- Michele, Lapo di1
- Michele, Maso di1
- Michele, Niccolò di1
- Middle East--Latin Orient1
- Military campaigns1
- Military history, Medieval1
- Minhāj al-ṭālibīn (Nawawī)1
- Miniato, Colombino1
- Missals1
- Missals (Service books)1
- Missouri--Saint Louis1
- Monasteries1
- Monasterio de San Jerónimo de Monte Olivete (Sant Pere de Ribes, Spain)1
- Monasterio de San Jerónimo de la Murtra (Badalona, Spain)1
- Monasterio de San Jerónimo del Valle de Hebrón (Barcelona, Spain)1
- Monastic and religious life--Early church1