William Christie chose a suitably light and breezy programme for this warm summer evening’s concert at St. John’s Smith Square. The concert was titled “Bach goes to Paris”, with works chosen to highlight the connections between the German master and his French contemporaries. But, more significantly, they showcased Christie’s deep affinity with French Baroque music, and the vibrancy and passion he brings to this repertoire.

''…after various Accidents, it comes to pass that he recovers both Her and his Kingdom”. Handel's Radamisto may be a tale of warring kingdoms, noble self-sacrifice and mature, wedded love, but it’s also a fairly daft piece of dramatic belief-suspension, whose various knotty conflicts get miraculously untangled in a brisk few bars of recitative, just in time for a rousing final chorus and whatever the ancient Armenian version is of a nice cup of tea.

 A Saudi princess in her white wedding dress digs her own grave as men pile up stones to hurl at her head — next, an Isis fighter is stabbing a knife at her neck to decapitate her. Ah, the fate of the heroine of the average baroque opera about the appalling ways of men and gods.

To hear The English Concert playing Handel is to arrive in technicolour Oz after a lifetime of black and white baroque in Kansas. We’re not short on period bands in the UK, but few bring this music into anything like the kind of focus that Harry Bicket and his crack team of musicians achieve, nor demonstrate such love and joy in the process.

Whatever musicologists may tell us about the patchy authenticity of Monteverdi’s last two operas, they unquestionably make a pair. Il ritorno di Ulisse is all about fidelity and ends with a love duet between the reunited husband and wife.

“Never give one concert if you can give a hundred” might stand as a motto for the conductor who once hauled his choir and orchestra round the world performing all 200 or so of Bach’s cantatas. And mathematically Sir John Eliot Gardiner’s latest project is a nearly exact honouring of that idea.

The annual London Handel Festival is dutifully working its way through every one of Handel’s operas in a cycle that will eventually take us from Alcina to Xerxes before, presumably, starting all over again. But each year, alongside these headliners, we also get a pasticcio – an opera stitched together by Handel from the shiniest and most decorative musical scraps by his European colleagues.

Marian devotions have given us some of sacred music’s most striking works, from graceful Ave Marias to anguished settings of the Stabat Mater. Andreas Scholl and musicologist Bernardo Ticci have recently gone in search of some less familiar ones – companion pieces for Vivaldi’s theatrical Stabat Mater, which has long been part of Scholl’s concert repertoire.

Canadian soprano Karina Gauvin has one of the most beautiful voices in the business – a glinting crystal blade sheathed in velvet. She wields it with skill, darting swiftly with coloratura one minute, before stabbing deep with emotion the next. In Handel she’s peerless, and this was an exhibition round of a programme, designed to show both singer and composer at their best.

Handel’s Alcina is about sex, certainly. But unlike Olivia Fuchs’s new production for the Royal Academy of Music, it’s about an awful lot of other things as well. Power, illusion, ageing, love, gender, family, intimacy – all these themes find themselves transformed on Alcina’s magical island, reworked by the end into ideas that are altogether darker and more complicated. But there’s nothing complicated about this vision.