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Water Transport Mechanisms in Porous Media

The wetting process of a completely dry building material (e.g. bricks or stones) involves several phenomena. It starts with vapour diffusion and the absorption of moisture by adsorption, which through interstitial condensation leads to capillary flow, resulting in a moisture saturated building material.
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Fortified Church of Ghelinta

I recently spent some of my holiday in Transylvania where I visited several old churches. Ghelinta, a tiny town in deepest Transylvania, is home to a church whose amazing interior wall paintings look almost as fresh as when they were first put there, six or seven centuries ago.
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Fortified Church of Prejmer

I recently spent some of my holiday in Transylvania where I visited several old churches. The fortified church of Prejmer is one of the most important medieval historic monuments in Transylvania. The church was founded by the Germanic Teutonic Knights.
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