The Meertens Institute studies the diversity in language and culture in the Netherlands. Within this broad empirical domain, four research fields are being distinguished: oral culture, traditions and rituals, syntactic variation andphonological variation. The research area referred to as oral culture investigates the oral tradition of songs and folk tales in the Netherlands. Traditions and rituals are primarily considered as forms of (public) action in which a person or group experiences and propagates his, her or its identity. Syntactic variation focuses on linguistic variation within sentences, whereas phonological variation focuses on linguistic variation within sounds. These four domains have a long history in the Meertens Institute: they are supported by large constructed corpora, and the Institute s researchers belong to the international top of their fields.