The dust destruction timescales in the coresof clusters of galaxies are relatively short given theirhigh central gas densities.However, substantial mid-infraredand sub-mm emission has been detected in many brightestcluster galaxies.In this letter we present Herschel PACS and SPIREphotometry of the brightest cluster galaxy in three strong cooling flowclusters, A1068, A2597 and Zw3146. This photometry indicates that a substantialmass of cold dust is present (}3 imes 10^7~M_odot$ -->)at temperaturessignificantly lower (20-28K) than previously thought based onlimited MIR and/or sub-mm results. The mass and temperatureof the dust appear to match those of the cold gas traced by CO with a gas-to-dust ratio of 80-120.Key words: galaxies: clusters: intracluster medium - galaxies: elliptical and lenticular, cD
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