Since 2009, the stones of the foundation walls of Temple 1 (Great Temple) have been conserved in Hattuscha under the direction of the Erfurt University of Applied Sciences (Prof. T. Staemmler).

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The blocks are made of limestone. It is affected by cracks, breaks, peeling, crumbling and biogenic infestation.

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The following measures were essentially carried out:

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• Mechanical cleaning of growth in cracks and crevices

• if necessary, removal of old supplements and firming agents

• Strengthening or bonding of the endangered areas with epoxy resin Araldite® HY 103 (resin) and REN HY 956 (hardener); Thinning with MEK, thickening with Aerosil®18 HK 1308 and marble powder <90 μm (2: 1)

• Sealing of the crevices or slopes of the shells with acrylic resin-bound mortar (ROMSTEDT factory dry mix 002 (fine) for limestone and ROMSTEDT acrylic resin binder (1: 3))

• Point retouch with pigmented acryl resin dispersion