She met Mr. Rylance soon thereafter while working on a production of “The Wandering Jew” in 1987. They married in 1989. The next year, they formed a theater company called Phoebus Cart, which staged unconventional productions of Shakespeare. The couple took out a second mortgage on their house to fund a 1991 “Tempest” on the site of the old Globe of Shakespeare’s time. They also helped lead the effort to reconstruct the theater, which opened in 1997.
Ms. van Kampen was the composer, arranger and musical director of productions of “Twelfth Night” and “Richard III” that opened at the Belasco in 2013, both starring Mr. Rylance. Under her direction, the show featured a pit band of musicians who played Elizabethan instruments like the shawm, sackbut, theorbo, hurdy-gurdy, cittern, tabor and rauschpfeife.
In 2015, a soundtrack for “Wolf Hall,” the television series starring Mr. Rylance as Thomas Cromwell, based on the Hilary Mantel historical novel, was released with Tudor-era music selected and arranged by Ms. van Kampen. In 2016, she directed a Brooklyn production of “Nice Fish,” a play focused on the very non-Shakespearean subject of ice fishing; it was written by Mr. Rylance and the poet Louis Jenkins.
Ms. van Kampen’s first marriage was to Chris van Kampen, an architect. Their daughter Natasha van Kampen died of a brain hemorrhage she had on a flight from New York to London in 2012. In addition to Juliet — also a daughter from her first marriage, though she took Mr. Rylance’s name — she is survived by her husband.
“I’ve lost count of how many projects we’ve imagined, sitting there at our kitchen table,” Mr. Rylance told The Guardian in 2023 about his marriage. “Claire came to me with two children whom I raised with her and Chris, but we never had children of our own so, to some degree, our projects have been our children. They are an incredible, creative joy to us, and Claire is the rock of my life.”
