- Where
- Idanha-a-Nova, Castelo Branco District
eastern central Portugal - Coordinates
- 40.04° N
7.11° W - Hill
- Granite, 758 m
(Mons Sanctus, Wikipedia) - Parish
- 829 people (2011)
(Monsanto parish, before its 2013 merger) - Title
- “The most Portuguese village of Portugal”
(contest of 1938) - Getting there
- By road from Castelo Branco
or about 3 h from Lisbon - Best visited
- March to May and September to November
- Advisory
- Portugal Level 1
The lane climbed steeply between boulders as big as cottages, and some of them were cottages: a door set into the rock, a window beneath it, red roof tiles running out from under a great grey stone as if tucked in for the night. Cats slept in every warm crack. From the broken walls on top, the plain lay olive-grey right out to the haze.
The short answer
Monsanto is a village in the municipality of Idanha-a-Nova, in Portugal’s Castelo Branco District, in the old province of Beira Baixa. It stands on the slopes of a granite hill, the Mons Sanctus of the Romans, that rises abruptly from the plain to 758 metres, and its houses are built into the landscape itself: caves and boulders serve as walls, rooms and roofs, Wikipedia records. The old parish of Monsanto had 829 people in 2011; in 2013 it was merged with Idanha-a-Velha. Monsanto was the seat of its own municipality from 1174 to 1853. In 1938 it won a national contest as “the most Portuguese village of Portugal”, and it is one of the network of Historic Villages of Portugal.
Why it's worth knowing
A village among boulders. The hill is strewn with rounded granite blocks, many larger than the houses, and Monsanto’s builders worked with them rather than clearing them. Houses fill the gaps between boulders, run under overhangs, and take a rock face as a back or side wall; a few use a single boulder as a roof. The best known of these, the Casa de uma só telha, “house of a single tile”, is roofed by one granite block, Portuguese and travel sources describe (as indexed). Lanes of polished granite climb steeply between them to the castle.
“The most Portuguese village”. In 1938 the Secretariat of National Propaganda of the Estado Novo, Portugal’s authoritarian regime, held a contest to find the most Portuguese village in each province and then in the country, Wikipedia records. Monsanto won. Its trophy, a silver rooster, the Galo de Prata, designed by Abel Pereira da Silva, is shown in replica on top of the Lucano or clock tower, and copies of it were put up on churches and towers elsewhere in Portugal, Portuguese Wikipedia notes. The title was a piece of state image-making, and it stuck.
A Templar castle. King Afonso Henriques took Monsanto from the Moors in the twelfth century and in 1165 gave it to the Knights Templar, whose master, Gualdim Pais, had the fortress built; Sancho I rebuilt and resettled it after wars with León, and the Order of Santiago later held it, by Wikipedia’s account. It withstood a siege in the seventeenth century and another in the eighteenth. In 1815 lightning set off the castle’s powder magazine and the explosion wrecked the medieval keep, Portuguese Wikipedia records; its walls and ruins still crown the hill.
The field notes
The feast of the Holy Cross
Each year around 3 May, Monsanto holds the Festa da Divina Santa Cruz, also called the Festa das Cruzes or of the Castle. Women in their best traditional dress walk up to the castle playing adufes, square frame drums, and carrying marafonas, rag dolls on a cross-shaped frame, and a white pot decorated with flowers is thrown from the walls to break on the rocks below. It recalls a legend of a long siege, which the tellings place under the Romans, the Moors or the Spanish: with only one calf and a little wheat left, the defenders fed the wheat to the calf and threw it over the wall, and the besiegers, seeing it burst full of grain, decided the castle could hold out for ever and left, by the accounts of the municipality and Portuguese guides (as indexed). The village’s women’s drumming group, the Adufeiras de Monsanto, keeps the music alive.
Writers and films
The novelist Fernando Namora practised as a country doctor in Monsanto, and his house and old surgery are among the village’s listed buildings, Portuguese Wikipedia records. More recently the village was a filming location for the television series House of the Dragon, by the same account. The local dishes it names are oven-roast kid, stewed aubergine and rice with hare.
A house built under a granite boulder, April 2015.
Photograph: Alvesgaspar · CC BY-SA 4.0 · cropped
Boulders built into the castle wall, the plain below, April 2015.
Photograph: Alvesgaspar · CC BY-SA 4.0 · cropped
- Climb to the castle towards evening, and stay while the light goes off the plain.
- Sort the boulders that are houses from the houses that are boulders. (Some fitted both columns. I have added a third, headed ‘both’.)
- Speak softly in the lanes. Some of those doors in the rocks open straight into somebody’s kitchen.
- Wear shoes with grip. The granite underfoot has been polished for centuries by people going home.
- Order the roast kid and eat it outside, slowly, with the hill at your back.
The house of a single tile. In Monsanto, a house whose entire roof is one granite boulder, known as the Casa de uma só telha, “house of a single tile”: its walls were built up beneath the rock, so that the boulder that was there first became the roof, Portuguese and travel sources describe (as indexed). It is a private house in a lived-in lane, and it is looked at from outside.
Tally, in the marginFor ages I puzzled over how anybody had hoisted it up there, until the obvious arrived, late as usual: nobody had hoisted anything. The stone came before the house. The house simply moved in underneath, like a sensible person sheltering from the rain, and stayed.
Getting there
How to get there. By road. Monsanto lies in the east of Castelo Branco District, about 50 km north-east of the city of Castelo Branco [Est.], which has trains from Lisbon; from there the usual way on is by car or taxi, since local buses are infrequent. By car it is about three hours from Lisbon [Est.: about 270 km]. Parking is outside the old village; the lanes are for walking.
When to go. Spring and autumn. Summers in Beira Baixa are hot and bring wildfire risk: in late July 2025 a fire that began near Penamacor burned about 3,000 hectares in that municipality and Idanha-a-Nova, Portuguese press reported (as indexed); it is not reported to have reached the village. The Festa da Divina Santa Cruz is around 3 May.
What to arrange ahead. A bed in the village if you want it in the evening, when the day visitors have gone; there are guesthouses and a pousada. Otherwise nothing.
Safety. The State Department has Portugal at Level 1, exercise normal precautions, its lowest level; it advises vigilance against petty theft in crowded tourist areas and on public transport (advisory dated 23 December 2025 in its feed, read 7 October 2026). The hazards here are steep, smooth granite lanes, heat in summer, and fire-season restrictions.
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Common questions
Where is Monsanto in Portugal?
Monsanto is a hill village in the municipality of Idanha-a-Nova, Castelo Branco District, in eastern central Portugal. It stands on a granite hill rising to 758 metres above the plain, about three hours by car from Lisbon.
Why are the houses in Monsanto built under rocks?
Monsanto’s granite hill in eastern Portugal is strewn with boulders larger than houses, and its builders used them rather than clearing them: houses fill the gaps, shelter under overhangs and use rock faces as walls. A few, like the Casa de uma só telha, take a single boulder as a roof.
Why is Monsanto called the most Portuguese village in Portugal?
In 1938 the Estado Novo’s Secretariat of National Propaganda held a national contest for the most Portuguese village, and Monsanto, in Idanha-a-Nova, won. Its prize, a silver rooster designed by Abel Pereira da Silva, stands in replica on the village clock tower.
What is the house of one tile in Monsanto?
The Casa de uma só telha, “house of a single tile”, in the Portuguese village of Monsanto, is a house whose whole roof is one granite boulder. It is the best-known example of the village’s houses built beneath and between the rocks of its hill.
Who built Monsanto Castle?
Monsanto Castle in eastern Portugal was built after King Afonso Henriques gave the place to the Knights Templar in 1165, under their master Gualdim Pais. Sancho I rebuilt it after wars with León. In 1815 lightning detonated its powder magazine, and the medieval keep was destroyed.
What is the Festa das Cruzes in Monsanto?
The Festa da Divina Santa Cruz, or Festa das Cruzes, is held in Monsanto, Portugal, around 3 May. Women in traditional dress play square adufe drums, and a flower-decked pot is thrown from the castle walls, recalling a legend of defenders who threw down a calf full of wheat to end a siege.
How do you get to Monsanto?
Monsanto is reached by road. The nearest city is Castelo Branco, about 50 km south-west, which has trains from Lisbon; from there visitors go on by car or taxi. Driving from Lisbon takes about three hours. Cars park outside the old village, whose granite lanes are walked.
Was House of the Dragon filmed in Monsanto?
Yes. Portuguese Wikipedia records that Monsanto, the boulder village in Idanha-a-Nova, Portugal, was a filming location for House of the Dragon, the prequel to Game of Thrones. The village is also known for winning a 1938 contest as the most Portuguese village in Portugal.