large, dark-grey, irregularly shaped object that appears to be made of metal

large, dark-grey, irregularly shaped object that appears to be made of metal. The object is hanging on a pale beige wall, with a rough texture that makes it appear somewhat grainy. The object is slightly angled, with its left edge closer to the viewer than its right. It appears to be old, as it is covered in rust and other markings. The object is located in Barcelona, Spain, specifically at 41.383 latitude and 2.167 longitude. The location is within the Barcelona Museum of Contemporary Art (MACBA). No people are visible in the image.