Halprin Open Space Sequence

{{Short description|Series of urban open spaces and pedestrian zones in Portland, Oregon, U.S.}}

{{Use mdy dates|date=August 2023}}

{{Infobox NRHP

| name = Halprin Open Space Sequence

| nrhp_type =

| image = Halprin Open Space Sequence - 3rd Ave ped mall between Lovejoy Fountain and Harrison.jpg

| caption = Looking north on a pedestrian mall on the alignment of 3rd Ave towards Harrison St

| location= Open spaces and pedestrian malls from Lincoln Street to Clay Street, downtown Portland, Oregon

| coordinates = {{coord|45|30|39.5|N|122|40|44.2|W|region:US_type:landmark|name=Halprin Open Space Sequence|display=inline,title}}

| locmapin = USA Portland downtown

| map_caption = Approximate location in downtown Portland

| map_label =

| built = 1966–1970

| architect = Halprin, Lawrence

| architecture = Modern Movement

| added = March 6, 2013

| area = less than one acre

| refnum = 130000058

}}

File:Halprin Open Space Sequence - 3rd Ave pedestrian mall looking south at Mill (2015).jpg

The Halprin Open Space Sequence is a series of urban open spaces and pedestrian zones between Southwest Lincoln Street and Clay Street, in downtown Portland, Oregon, United States. Designed by Lawrence Halprin, the project was completed during 1966–1970, and was added to the National Register of Historic Places on March 6, 2013.{{cite web |title=Halprin Open Space Sequence |url=https://www.nps.gov/nr/feature/places/13000058.htm |date=2013 |publisher=National Park Service (U.S. Department of the Interior) |accessdate=August 8, 2023 |archive-url=https://web.archive.org/web/20140819090719/https://www.nps.gov/nr/feature/places/13000058.htm |archive-date=August 19, 2014 |url-status=dead}} It includes Keller Fountain Park, Lovejoy Fountain Park, and Pettygrove Park, along with several other elements.