BUCHAREST, Romania — In her studio, the Romanian conceptual artist Geta Bratescu was looking at a large drawing she had made in 2012 of a bird dressed as a clown. The 91-year-old artist remarked how much younger she was when she made the piece. “What I work with these days is smaller,” said Mrs. Bratescu. “This big surface is harder for me to work with now.”

Mrs. Bratescu is in her studio daily, she said. She had set it up with everything she needs within reach from her chair. Fat markers were lined up in a row to her right; strips of paper cascaded out of pots next to a selection of scissors, and a metal ruler framed a small patch of surface where Mrs. Bratescu draws and makes collages. To her left, a stack of her recent pieces was held in place with a paperweight in the shape of a bird.

Mrs. Bratescu’s studio is peppered with mementos from her childhood, and a photograph of her mother and a portrait of her father by her hang on the wall.