Actopan Monastery

The Augustinians built at Actopan as if painting were structural. Their monastery of San Nicolas de Tolentino, begun in 1546 where the Mezquital valley meets the hills, is first a fortress - a single square tower with Moorish echoes, battlemented walls, a vast atrium - and then, inside, the greatest surviving mural program of early colonial Mexico. The stairwell is the celebrated set piece: three storeys of black-and-red frescoes in grisaille, portraying Augustinian hermits, doctors of the church and founders in an architecture of painted niches, executed by indigenous artists trained on European engravings. Corridors, refectory and sala continue the cycle by the hundred square metres. Outside, the open chapel's colossal barrel vault - among the largest of its kind - carries an apocalyptic Last Judgment whose hell scenes, monsters and cosmologies read as a Mesoamerican-European negotiation conducted in pigment. Scholars cross continents for these walls; visitors mostly have them alone, with the Mezquital's cactus plains humming beyond the atrium cross.

What you actually see

• The frescoed stairwell - three storeys of hermits and doctors in red and black.
• The open chapel vault - the monumental painted Last Judgment.
• The fortress architecture - tower, battlements and atrium of 1546.
• The cloisters - painted corridors around the garden square.

When to go

Dry-season mornings for raking light on the facade and comfortable fresco-gazing; any day but the INAH Monday closure. Actopan's Wednesday market adds Mezquital life - and its famous barbacoa - to the visit.

Honest expectations

Lighting inside is kept conservation-dim; give your eyes time. Interpretation is Spanish and scholarly where present. The town around is workaday Mezquital - the monastery is the destination.

Nearby

Ixmiquilpan's church - with its extraordinary indigenous battle murals - lies up the road; the Tolantongo canyons and Pachuca frame the wider loop.