This chapter provides a critical review of the blossoming of Linguistic Landscape (LL) as a research field in the early 21st century. Arguing that the LL itself is at least as old as written language, the chapter examines the multiple sources of contemporary LL research in such fields as onomastics, the visual arts, language policy and planning, and examinations of the social and linguistic outcomes of multilingualism, globalisation, and population movement. The chapter argues that the field of LL research did not stem from any one source, but instead developed from bringing together researchers from different interests and parts of the world. The chapter reviews terminology in the field from English and French, and argues for the use of LL as one which is broad enough to include a wide range of modes of expressing meaning, but retains a focus on language that gives it a distinct conceptual identity.