Real property 185 Thermal properties 120 Valuation 62 Congresses 60 Property 58 Law and legislation 50 Optical properties 50 Mechanical properties 46 Electric properties 44 Real property tax 36 Matter 35 Polymers 35 Properties 33 Materials 30 Heat 29 Solids 28 Intellectual property 26 History 25 Land use 23 Cultural property 22 Land tenure 22 Plastic properties 21 Protection 21 Magnetic properties 20 Metals 20 Cultural property, Protection of 18 Prices 18 Transmission 18 Soils 17 Property tax 15