Limeworks - Recovering a Material history is a diploma project about Siporexhallen, a remains of a former cement factory located in the northeastern part of Gotland, Sweden. This diploma seeks to recover a lost material history and to ask what can be built in and of the ruin of an abandoned early industrial limework, through reuse of mass produced materials left on site. Since the closing of the factory in Valleviken in 1947, a lot of the traces of the early modern limestone industry have disappeared. The workers and rails transporting limestone are long gone, and most of the factory complex was demolished and dumped into the sea in 1968. Today, only one of the factory buildings remain - Siporexhallen - located the furthest out towards the water front. The industrial building was a part of the original factory built between 1916-1919 and has over the years housed multiple programs and had several additions. This project proposes architectural interventions to the industrial building as acupuncture rather than as strategic transformation. Based on my study of history and present state on Gotland, I wanted to work locally rather than globally with the intent of making the building and area around it accessible for locals as well as summer tourists. With the tendency on Gotland of transforming industrial heritage into exclusive projects only catering to the wealthy, it became nessesary and important to develop the project with an economic realism. Three fragmented interventions explored in 1:20 models are made to the existing building trough locally mass-produced siporex materials.